Math Homework Answers - Recent questions and answers
https://www.mathhomeworkanswers.org/qa
Powered by Question2AnswerAina membina sebuah model kubus daripada kad Manila .Jika is padu kubus yang dibina it ialah (2+3p)³cm³,Cari jumlah luas permukaan kubus it dalam sebutan p
https://www.mathhomeworkanswers.org/241095/membina-sebuah-daripada-manila-dibina-jumlah-permukaan-sebutan
Mahirdiri5.2 matematik bahasa melayuAlgebra 2 Answershttps://www.mathhomeworkanswers.org/241095/membina-sebuah-daripada-manila-dibina-jumlah-permukaan-sebutanTue, 25 Apr 2017 14:10:55 +0000Answered: find expressions in terms of x
https://www.mathhomeworkanswers.org/241079/find-expressions-in-terms-of-x?show=241094#a241094
<p style="text-align: justify;">i) TS=PR=x+150
<br>
<br>
ii) length of fencing = 500 = QR+RS+TS+PT. RS=PT, the width of the pen.
<br>
<br>
So 500=x+2RS+x+150. Therefore 2x+2RS=350, x+RS=175 and RS=175-x.
<br>
<br>
iii) area=length x width=(x+150)(175-x)=26250+25x-x^2.
<br>
<br>
iv) we can write the area in a different way: 26250-(x^2-25x)=26250+12.5^2-(x^2-25x+12.5^2).
<br>
<br>
So we get area=26250+12.5^2-(x-12.5)^2; 26406.25-(x-12.5)^2.
<br>
<br>
The maximum value of the area is 26406.25 sq m when x=12.5m. This is the stationary value. Any other value of x will reduce the area from 26406.25 sq m.
<br>
<br>
v) 26406.25 sq m is the maximum area, = 162.5^2, length=width, a perfect square.</p>Geometry Answershttps://www.mathhomeworkanswers.org/241079/find-expressions-in-terms-of-x?show=241094#a241094Tue, 25 Apr 2017 14:01:16 +0000Answered: What is 10% of 18.3 kt
https://www.mathhomeworkanswers.org/241076/what-is-10%25-of-18-3-kt?show=241092#a241092
<p><em>What is 10% of 18.3 katrillion</em></p>
<p>10% is a tenth, so <span style="text-decoration: underline;"><strong>answer is 1.83 katrillion</strong></span></p>Other Math Topicshttps://www.mathhomeworkanswers.org/241076/what-is-10%25-of-18-3-kt?show=241092#a241092Tue, 25 Apr 2017 13:31:28 +0000Answered: how to simplify (((2-x)^(1/2))-1)/(x-1)
https://www.mathhomeworkanswers.org/241078/how-to-simplify-2-x-1-2-1-x-1?show=241091#a241091
<p><em>how to simplify (((2-x)^(1/2))-1)/(x-1) </em></p>
<p>Let the expression be (a - 1)/(x - 1), where a = sqrt(2 - x), so <span style="text-decoration: underline;">a^2 = 2 - x</span></p>
<p>Now multiply the expression, top and bottom, by (a + 1), to give</p>
<p>{(a - 1)(a + 1)} / {(x - 1)(a + 1)}</p>
<p>{(a^2 - 1)} / {(x - 1)(a + 1)</p>
<p>{2 - x - 1} / {(x - 1)(a + 1)}</p>
<p>{1 - x} / {(x - 1)(a + 1)}</p>
<p>(-1) / (a + 1)</p>
<p><span style="text-decoration: underline;"><strong>(-1) / (sqrt(2 - x) + 1)</strong></span></p>Other Math Topicshttps://www.mathhomeworkanswers.org/241078/how-to-simplify-2-x-1-2-1-x-1?show=241091#a241091Tue, 25 Apr 2017 13:29:34 +0000Answered: What are the integers?
https://www.mathhomeworkanswers.org/241075/what-are-the-integers?show=241090#a241090
<p><em>The greatest of four consecutive even integer is 14 less than twice the smallest integer. What are the integers?</em></p>
<p>Let teh four consectutive even integers be,</p>
<p>I1 = 2n, I2 = 2n + 2, I3 = 2n + 4, I4 = 2n + 6</p>
<p>We have, <em>The greatest is 14 less than twice the smallest</em></p>
<p>i.e. I4 = 2*I1 - 14</p>
<p>So, 2n + 6 = 2(2n) - 14</p>
<p>2n = 4n - 20</p>
<p>20 = 2n</p>
<p><span style="text-decoration: underline;">n = 10</span></p>
<p><span style="text-decoration: underline;"><strong>The numbers are: I1 = 20, I2 = 22, I3 = 24, I4 = 26</strong></span></p>Word Problem Answershttps://www.mathhomeworkanswers.org/241075/what-are-the-integers?show=241090#a241090Tue, 25 Apr 2017 13:16:55 +0000Answered: find the value of k such that the lines whose equations are 3x+5ky=7 and 9kx+8y=15 are parallel.
https://www.mathhomeworkanswers.org/241033/find-value-such-that-lines-whose-equations-and-9kx-parallel?show=241089#a241089
<p style="text-align: justify;">The slopes of two parallel lines are the same. To find the slope we ignore the constant term first.</p>
<p style="text-align: justify;">3x+5ky=0 and 9kx+8y=0. Next we divide the x coefficient by the y coefficient and equate them for the two lines: 3/5k=9k/8. Cross-multiply to solve for k: 24=45k^2. So k^2=24/45=8/15 and k=√(8/15)=2√30/15=0.7303. But k can also be -2√30/15.</p>
<p style="text-align: justify;">[If we substitute for k in the two linear equations we get 3x+2y√30/3=7 and 6x√30/5+8y=15.</p>
<p style="text-align: justify;">Or we get 3x-2y√30/3=7 and -6x√30/5+8y=15.]</p>Algebra 2 Answershttps://www.mathhomeworkanswers.org/241033/find-value-such-that-lines-whose-equations-and-9kx-parallel?show=241089#a241089Tue, 25 Apr 2017 13:12:55 +0000Answered: What is the ratio of 517218015 and 819500000
https://www.mathhomeworkanswers.org/241020/what-is-the-ratio-of-517218015-and-819500000?show=241087#a241087
819500000/517218015=1.5825 approx. So the ratio of small to large is 1:1.5825Other Math Topicshttps://www.mathhomeworkanswers.org/241020/what-is-the-ratio-of-517218015-and-819500000?show=241087#a241087Tue, 25 Apr 2017 12:56:32 +0000Answered: If 4/5 of a number is 36, what is the whole
https://www.mathhomeworkanswers.org/241022/if-4-5-of-a-number-is-36-what-is-the-whole?show=241083#a241083
Answer is 5/4*36=45Word Problem Answershttps://www.mathhomeworkanswers.org/241022/if-4-5-of-a-number-is-36-what-is-the-whole?show=241083#a241083Tue, 25 Apr 2017 08:13:21 +0000Find a polynomial that fits the points (2,3),(-1,5),(0,1)(1,4) and (2,10)
https://www.mathhomeworkanswers.org/241081/find-a-polynomial-that-fits-the-points-2-3-1-5-0-1-1-4-and-2-10
Under linear algebraAlgebra 1 Answershttps://www.mathhomeworkanswers.org/241081/find-a-polynomial-that-fits-the-points-2-3-1-5-0-1-1-4-and-2-10Tue, 25 Apr 2017 07:16:08 +0000of standad
https://www.mathhomeworkanswers.org/241077/of-standad
review of standad antidivariatives, in the mathametics course advence mathsOther Math Topicshttps://www.mathhomeworkanswers.org/241077/of-standadTue, 25 Apr 2017 05:04:38 +0000Answered: prove 1/(sec(theta)-1)-1/(sec(theta)+1)=2cot^2(theta)
https://www.mathhomeworkanswers.org/241032/prove-1-sec-theta-1-1-sec-theta-1-2cot-2-theta?show=241066#a241066
<p><em>prove 1/(sec(theta)-1)-1/(sec(theta)+1)=2cot^2(theta) </em></p>
<p>lhs = 1/(sec(t)-1) - 1/(sec(t)+1)</p>
<p>lhs = (sec(t) + 1)/(sec^2(t) - 1) - (sec(t) - 1)/(sec^2(t) - 1)</p>
<p>lhs = {(sec(t) + 1) - (sec(t) - 1)} / (sec^2(t) - 1)</p>
<p>lhs = {2} / (sec^2(t) - 1)</p>
<p>lhs = {2} / (tan^2(t))</p>
<p><span style="text-decoration: underline;"><strong>lhs = 2.cot^2(t) = rhs</strong></span></p>Trigonometry Answershttps://www.mathhomeworkanswers.org/241032/prove-1-sec-theta-1-1-sec-theta-1-2cot-2-theta?show=241066#a241066Mon, 24 Apr 2017 21:31:04 +0000Answered: given that log 2=0.3010 and log 3 =0.4771. find the value of log 0.075
https://www.mathhomeworkanswers.org/241038/given-that-log-2-0-3010-and-log-3-4771-find-the-value-of-log-0-075?show=241063#a241063
<p><em><span style="text-decoration: underline;"><a href="https://www.mathhomeworkanswers.org/241038/given-that-log-2-0-3010-and-log-3-4771-find-the-value-of-log-0-075" rel="nofollow">given that log 2=0.3010 and log 3 =0.4771. find the value of log 0.075 </a></span></em></p>
<p>These are all logs to the base 10.</p>
<p>So, log10 = 1, log 1000 = 3, etc.</p>
<p> </p>
<p>log 0.075 = log (75/1000 ) = log 75 - log 1000 = log 75 - 3</p>
<p>= log 3 + log 25 - 3</p>
<p>= log 3 + log 5^2 - 3</p>
<p>= log 3 + 2.log 5 - 3</p>
<p>= log 3 + 2(log 10/2) - 3</p>
<p>= log 3 + 2(log 10 - log 2) - 3</p>
<p>= log 3 + 2(1 - log 2) - 3</p>
<p>= log 3 + 2 - 2.log 2 - 3</p>
<p>= log 3 - 2.log 2 - 1</p>
<p>= 0.4771 - 0.602 - 1</p>
<p><span style="text-decoration: underline;"><strong>= -1.1249</strong></span></p>Trigonometry Answershttps://www.mathhomeworkanswers.org/241038/given-that-log-2-0-3010-and-log-3-4771-find-the-value-of-log-0-075?show=241063#a241063Mon, 24 Apr 2017 21:16:25 +0000Answered: From integers 1 up to 42, how many possible sets of integer are to be made if each set has six integers.
https://www.mathhomeworkanswers.org/241034/from-integers-many-possible-sets-integer-made-each-integers?show=241061#a241061
<p>The number of combinations of 6 digits out of 42 is 5245786.</p>
<p style="text-align: justify;">This is 42*41*40*39*38*37/(6*5*4*3*2*1) because there are 42 ways of selecting the first integer; having selected the first integer, there are now 41 choices for the second; then 40 for the third and so on. Once the integers have been there are 6!=6*5*5*4*3*2*1 way of arranging them. We are only interested in the set so we need to reduce the number by the ways they can be arranged.</p>Word Problem Answershttps://www.mathhomeworkanswers.org/241034/from-integers-many-possible-sets-integer-made-each-integers?show=241061#a241061Mon, 24 Apr 2017 20:39:39 +0000Answered: 1/4 a (-8b + 4c)jt
https://www.mathhomeworkanswers.org/241037/1-4-a-8b-4c-jt?show=241059#a241059
a/4(-8b+4)jt=a(-2b+1)jt=(-2ab+a)jt=-2abjt+ajtOther Math Topicshttps://www.mathhomeworkanswers.org/241037/1-4-a-8b-4c-jt?show=241059#a241059Mon, 24 Apr 2017 20:27:57 +0000Find a polynomial that fits the points (2,3),(-1,5),(0,1),(1,4) and (2,10)
https://www.mathhomeworkanswers.org/241058/find-a-polynomial-that-fits-the-points-2-3-1-5-0-1-1-4-and-2-10
Topic under linear algebraAlgebra 1 Answershttps://www.mathhomeworkanswers.org/241058/find-a-polynomial-that-fits-the-points-2-3-1-5-0-1-1-4-and-2-10Mon, 24 Apr 2017 19:42:37 +00003x^2-y^2=26;3x^2-5xy-12y^2. simultaneous
https://www.mathhomeworkanswers.org/241031/3x-2-y-2-26-3x-2-5xy-12y-2-simultaneous
Question of math science group class 10Punjab boardAlgebra 2 Answershttps://www.mathhomeworkanswers.org/241031/3x-2-y-2-26-3x-2-5xy-12y-2-simultaneousMon, 24 Apr 2017 10:24:10 +0000Answered: *Given: LMNB is a square, LM = 20 cm, P∈ LM , LP = 4 cm, K∈ PN , PK= 1 5 PN Find: Area of LPKB.
https://www.mathhomeworkanswers.org/241023/given-lmnb-is-square-lm-20-cm-p%E2%88%88-lm-cm-k%E2%88%88-pn-pk-pn-find-area-of-lpkb?show=241029#a241029
Not quite sure what you mean by your last statement what do you mean by PK= 1 5 PN. If PK is 15 time longer than PN you are way outside the square and could be argued that PK is not a member of PN.Geometry Answershttps://www.mathhomeworkanswers.org/241023/given-lmnb-is-square-lm-20-cm-p%E2%88%88-lm-cm-k%E2%88%88-pn-pk-pn-find-area-of-lpkb?show=241029#a241029Mon, 24 Apr 2017 09:29:46 +0000Answered: 2arcsin(x/sqrt6)+arcsin(4x)=180/2
https://www.mathhomeworkanswers.org/241007/2arcsin-x-sqrt6-arcsin-4x-180-2?show=241024#a241024
<p>Let sin(a)=x/√6 and sin(b)=4x; so 2a+b=180/2=90. 1/√6=√6/6.</p>
<p>cos(a)=√(1-x^2/6), cos(b)=√(1-16x^2)</p>
<p style="text-align:justify">sin(2a+b)=sin90=1=sin(2a)cos(b)+cos(2a)sin(b)=2sin(a)cos(a)cos(b)+(1-2(sin(a))^2)sin(b)</p>
<p style="text-align:justify">sin(2a+b)=2x√6/6√((1-x^2/6)(1-16x^2))+(1-2x^2/6)4x=1</p>
<p style="text-align:justify">(x/3)√((6-x^2)(1-16x^2))+4x-4x^3/3=1</p>
<p style="text-align:justify">x√((6-x^2)(1-16x^2))+12x-4x^3=3</p>
<p style="text-align:justify">x^2(6-x^2)(1-16x^2)=(4x^3-12x+3)^2</p>
<p style="text-align:justify">x^4+24x^3+138x^2-72x+9=0</p>
<p style="text-align:justify">From this equation, x=0.245 or 49/200.</p>
<p> </p>Trigonometry Answershttps://www.mathhomeworkanswers.org/241007/2arcsin-x-sqrt6-arcsin-4x-180-2?show=241024#a241024Sun, 23 Apr 2017 23:03:29 +0000find the value of r in the equation given: 17663.7= 25000 + 15247/(1+r) + 15247/(1+r)^2 + 15247/(1+r)^3 + 15247/(1+r)^4
https://www.mathhomeworkanswers.org/241021/find-value-equation-given-17663-25000-15247-15247-15247-15247
To try and solve for r and also making r the subject of the formulaAlgebra 1 Answershttps://www.mathhomeworkanswers.org/241021/find-value-equation-given-17663-25000-15247-15247-15247-15247Sun, 23 Apr 2017 20:47:25 +0000Answered: the large hand of a clock is 28 cm long. how many centimeters does its extremely move in 20 minutes.
https://www.mathhomeworkanswers.org/241018/large-clock-long-many-centimeters-does-extremely-move-minutes?show=241019#a241019
<p style="text-align: justify;">20 mins is 1/3 of the circumference. The radius of the circle is 28cm so the circumference is 28π. One third is 28π/3=29.32cm. The extreme point of the minute hand moves about 29.32cm. The angular distance is 360/3=120 degrees.</p>Trigonometry Answershttps://www.mathhomeworkanswers.org/241018/large-clock-long-many-centimeters-does-extremely-move-minutes?show=241019#a241019Sun, 23 Apr 2017 19:13:11 +0000Answered: find the product of 6x ( a3-b3 )
https://www.mathhomeworkanswers.org/127654/find-the-product-of-6x-a3-b3?show=241011#a241011
If you remember that 6 x 4 (say) is 6 lots of 4 or to write out a long way 4+4+4+4+4+4 when you've 6 lots of anything you just write it down 6 times.<br />
<br />
so you've got<br />
<br />
a3-b3<br />
<br />
a3-b3<br />
<br />
a3-b3<br />
<br />
a3-b3<br />
a3-b3<br />
a3-b3 <br />
<br />
Which is 6a3-6b3Algebra 1 Answershttps://www.mathhomeworkanswers.org/127654/find-the-product-of-6x-a3-b3?show=241011#a241011Sun, 23 Apr 2017 07:30:09 +0000Answered: what is the x & y-intercepts of y=3x+3 (-1,-1)
https://www.mathhomeworkanswers.org/240944/what-is-the-x-%26-y-intercepts-of-y-3x-3-1-1?show=241009#a241009
This question does not completely make sense as (-1,-1) is not a point on the line. We c an show this because if x=-1 we have y=3*-1+3=-3+3=0.So when x=-1 y=0. Therefore the x intercept is -1.<br />
<br />
The y intercept is always easy to find becuase it is the number on its own in the equation +3<br />
<br />
so the x intercept is (-1,0) The y intercept is (0,3)Algebra 1 Answershttps://www.mathhomeworkanswers.org/240944/what-is-the-x-%26-y-intercepts-of-y-3x-3-1-1?show=241009#a241009Sun, 23 Apr 2017 07:21:56 +0000Answered: (a/x-b) + (b/x-a) =2 using quadratic formula
https://www.mathhomeworkanswers.org/240999/a-x-b-b-x-a-2-using-quadratic-formula?show=241001#a241001
<p><em><a rel="nofollow" href="https://www.mathhomeworkanswers.org/240999/a-x-b-b-x-a-2-using-quadratic-formula">(a/x-b) + (b/x-a) =2 using quadratic formula </a></em></p>
<p>a/(x - b) + b/(x - a) = 2</p>
<p>a(x - a) + b(x - b) = 2(x - a)(x - b)</p>
<p>x(a + b) - (a^2 + b^2) = 2(x^2 - (a+b)x + ab)</p>
<p>2x^2 - 3(a + b)x + (a + b)^2 = 0</p>
<p>Quadratic formula is: x = {-B +/sqrt(B^2 - 4AC)}/(2A), where A = 2, B = -3(a + b), C = (a + b)^2</p>
<p>So then,</p>
<p>x = {3(a + b) +/- sqrt(9(a + b)^2 - 4*2*(a + b)^2)} / (2*2)</p>
<p>x = {3(a + b) +/- sqrt((a + b)^2)} / (4)</p>
<p>x = (a + b){3 +/- 1)} / (4)</p>
<p><span style="text-decoration: underline;">x = (a + b){1 , 1/2)} </span></p>
<p><span style="text-decoration: underline;"><strong>Answer: x = (a + b), x = (a + b)/2</strong></span></p>Pre-Algebra Answershttps://www.mathhomeworkanswers.org/240999/a-x-b-b-x-a-2-using-quadratic-formula?show=241001#a241001Sat, 22 Apr 2017 17:18:32 +0000Answered: A number when divided successively by 4 and 5 leaves remainders 1 and 4 respectiveky. Whenb it is successively divided by 5 and 4, what will be the respective remainders?
https://www.mathhomeworkanswers.org/240990/successively-respectiveky-successively-respective-remainders?show=240998#a240998
<p><em>A number when divided successively by 4 and 5 leaves remainders 1 and 4 respectiveky. Whenb it is successively divided by 5 and 4, what will be the respective remainders? </em></p>
<p>Let the number be N. Then</p>
<p>N/4 = M + R=1 (the 1st remainder)</p>
<p>M/5 = K + R=4 (the 2nd remainder)</p>
<p>Reversing the above two operations,</p>
<p>M = 5K + 4</p>
<p>N = 4M + 1 (now substitute for M into this eqn)</p>
<p><span style="text-decoration: underline;">N = 20K + 17</span></p>
<p>Now do division of N by 5 then 4 successively</p>
<p>N/5 = (4K + 3) + <span style="text-decoration: underline;">R=2</span></p>
<p>(4K + 3)/4 = (K + 0) + <span style="text-decoration: underline;">R=3</span></p>
<p><span style="text-decoration: underline;"><strong>So, the two remainders now are 2 and 3, repectively</strong></span></p>
<p> </p>
<p><span style="text-decoration: underline;">Check</span></p>
<p>Let K = 3, say</p>
<p>Then, N = 20K + 17 = 60 + 17 = 77</p>
<p>Dividing by 4 then 5,</p>
<p>77/4 = 19 + <span style="text-decoration: underline;">R=1</span></p>
<p>19/5 = 3 + <span style="text-decoration: underline;">R=4</span></p>
<p>Giving us the first two remainders of 1 and 4</p>
<p>Now divide N = 77 by 5 first then by 4.</p>
<p>77/5 = 15 + <span style="text-decoration: underline;">R=2</span></p>
<p>15/4 = 3 +<span style="text-decoration: underline;"> R=3</span></p>
<p><span style="text-decoration: underline;">The Check gives us the same two remainders, 2 and 3 respectively</span></p>Other Math Topicshttps://www.mathhomeworkanswers.org/240990/successively-respectiveky-successively-respective-remainders?show=240998#a240998Sat, 22 Apr 2017 13:44:45 +0000Answered: (2x+9)^2=64
https://www.mathhomeworkanswers.org/240946/2x-9-2-64?show=240985#a240985
( 2x+9)^2 = 64<br />
<br />
(2x +9)^2 -64 = 0<br />
<br />
(2x+9)^2 - 8^2 = 0 ; ( a^2 - b^2 = ( a-b)(a+b)<br />
<br />
(2x+9-8)(2x+9+8) = 0<br />
<br />
(2x+1)(2x+!7) = 0<br />
<br />
x = - 1/2 or x = - 17/2Word Problem Answershttps://www.mathhomeworkanswers.org/240946/2x-9-2-64?show=240985#a240985Fri, 21 Apr 2017 23:19:27 +0000Answered: if a loan began on August 15 and is due on October 15, what is the ordinary time for this period?
https://www.mathhomeworkanswers.org/240954/loan-began-august-october-what-the-ordinary-time-this-period?show=240980#a240980
<p>Ordinary time is based on 360 days in a year, and each month has 30 days.</p>
<p style="text-align: justify;">Based on this, there are 15 days left in August before the end of the month. Then come 30 days for September, followed by 15 in October: 15+30+15=60 days.</p>Word Problem Answershttps://www.mathhomeworkanswers.org/240954/loan-began-august-october-what-the-ordinary-time-this-period?show=240980#a240980Fri, 21 Apr 2017 19:53:44 +0000Answered: sinx/tanxcosx
https://www.mathhomeworkanswers.org/240969/sinx-tanxcosx?show=240979#a240979
tanx=sinx/cosx, so tanxcosx=sinx, therefore the expression is sinx/sinx=1Trigonometry Answershttps://www.mathhomeworkanswers.org/240969/sinx-tanxcosx?show=240979#a240979Fri, 21 Apr 2017 19:35:06 +0000Answered: the average of 4 numbers is 85. if 3 of those numbers are 76, 78, and 81, what is the 4th number
https://www.mathhomeworkanswers.org/23208/the-average-numbers-those-numbers-are-and-what-the-4th-number?show=240972#a240972
340 i believe is your accurate answer. let me know if you need more help and i'll be thereWord Problem Answershttps://www.mathhomeworkanswers.org/23208/the-average-numbers-those-numbers-are-and-what-the-4th-number?show=240972#a240972Fri, 21 Apr 2017 17:28:51 +0000Answered: What are those?
https://www.mathhomeworkanswers.org/240949/what-are-those?show=240971#a240971
<p><em>I'm very sorry but I have no idea what you're trying to ask.... can you please repeat this question but a question that makes more sense than "what are those"? Thank you!!!</em></p>Word Problem Answershttps://www.mathhomeworkanswers.org/240949/what-are-those?show=240971#a240971Fri, 21 Apr 2017 17:27:11 +0000Answered: Water flows through a 7cm diameter pipe at the rate of 4 metres / second
https://www.mathhomeworkanswers.org/240953/water-flows-through-7cm-diameter-pipe-the-rate-metres-second?show=240965#a240965
<p><em>Water flows through a 7cm pipe at the rate of 4m/s.how many cm³ of water flow through the pipe in one second </em></p>
<p>Diameter of pipe is D = 7 cm.</p>
<p>Cross sectional area of pipe is A= pi.(D^2)/4 cm^2</p>
<p>A = pi*49/4 = <span style="text-decoration: underline;">38.48 cm^2</span></p>
<p>Water flows at v = 4 m/s</p>
<p>Water flow rate is Q = Av = 38.48 * 4 = <span style="text-decoration: underline;">153.94 cm*3/s</span></p>
<p><span style="text-decoration: underline;"><strong>Q = 154 cm^3/s</strong></span> = 154 * 10^(-3) litres/s = 0.154 litre/min</p>
<p><span style="text-decoration: underline;"><strong>Q = 0.154 l/s</strong></span></p>Other Math Topicshttps://www.mathhomeworkanswers.org/240953/water-flows-through-7cm-diameter-pipe-the-rate-metres-second?show=240965#a240965Fri, 21 Apr 2017 15:15:07 +00005 2 2 2 = 37
https://www.mathhomeworkanswers.org/240956/5-2-2-2-37
if 5, 2, 2, 2 equal 37<br />
<br />
and 2, 3, 8, 1 equal 34<br />
<br />
what does 1, 1, 1, 9 equal<br />
<br />
answner is (a) 15, (b) 31 (c) 21 (d) 19<br />
<br />
need to know the working out of this questionOther Math Topicshttps://www.mathhomeworkanswers.org/240956/5-2-2-2-37Fri, 21 Apr 2017 12:17:51 +0000Answered: NEED HELP FAST!!!!!
https://www.mathhomeworkanswers.org/198816/need-help-fast?show=240948#a240948
hi noobsWord Problem Answershttps://www.mathhomeworkanswers.org/198816/need-help-fast?show=240948#a240948Fri, 21 Apr 2017 03:35:34 +0000Proof J-3/2 (x) = -√(2/πx) ((cosx/x)+sinx)
https://www.mathhomeworkanswers.org/240947/proof-j-3-2-x-%E2%88%9A-2-%CF%80x-cosx-x-sinx
Bessel solutionOther Math Topicshttps://www.mathhomeworkanswers.org/240947/proof-j-3-2-x-%E2%88%9A-2-%CF%80x-cosx-x-sinxFri, 21 Apr 2017 01:48:12 +0000Answered: why in every graph the sum of the degrees of all the vertices equals twice the number of edges?
https://www.mathhomeworkanswers.org/54935/every-graph-degrees-vertices-equals-twice-the-number-edges?show=240930#a240930
Every edge is connected to exactly two vertices.Geometry Answershttps://www.mathhomeworkanswers.org/54935/every-graph-degrees-vertices-equals-twice-the-number-edges?show=240930#a240930Thu, 20 Apr 2017 14:29:31 +0000How can you tell from the model if the ratio is increasing or decreasing
https://www.mathhomeworkanswers.org/240926/can-you-tell-from-the-model-the-ratio-increasing-decreasing
The model was (2/9)-(8/9t+99)Algebra 1 Answershttps://www.mathhomeworkanswers.org/240926/can-you-tell-from-the-model-the-ratio-increasing-decreasingThu, 20 Apr 2017 13:36:06 +0000Answered: how to solve 4X-5y=11 AND 7x+9y=3 USING ELIMINATION
https://www.mathhomeworkanswers.org/240918/how-to-solve-4x-5y-11-and-7x-9y-3-using-elimination?show=240923#a240923
<p><em>how to solve 4X-5y=11,7x+9y=3 USING ELIMINATION</em></p>
<p>The eqns are:</p>
<p>4x - 5y = 11</p>
<p>7x + 9y = 3</p>
<p>Let's eliminate the y's say, by multiplying the 1st eqn by 9 and the 2nd eqn by 5.</p>
<p>This gives us,</p>
<p>36x - 45y = 99</p>
<p>35x + 45y = 15</p>
<p>Now simply add the two eqns together, to give</p>
<p>71x = 114</p>
<p><span style="text-decoration: underline;">x = 114/71</span></p>
<p>Substituting for x = 114/71 in the 1st eqn, we get</p>
<p>4(114/71) - 5y = 11</p>
<p>456/71 - 11*(71/71) = 5y</p>
<p>456 - 781 = 71*5y</p>
<p>-325 = 71*5y</p>
<p>-65 = 71y</p>
<p><span style="text-decoration: underline;">y = -65/71</span></p>
<p><span style="text-decoration: underline;"><strong>Answers: x = 114/71, y = -65/71</strong></span></p>Geometry Answershttps://www.mathhomeworkanswers.org/240918/how-to-solve-4x-5y-11-and-7x-9y-3-using-elimination?show=240923#a240923Thu, 20 Apr 2017 06:20:11 +0000Answered: Date both clean on same day
https://www.mathhomeworkanswers.org/184125/date-both-clean-on-same-day?show=240920#a240920
April 16th.<br />
<br />
The LCM of 3 and 5 is 15 so count 15 days from April 1st.Word Problem Answershttps://www.mathhomeworkanswers.org/184125/date-both-clean-on-same-day?show=240920#a240920Thu, 20 Apr 2017 05:10:07 +0000Answered: {0 for is odd, (1/(2n+1))^n} test this series answers or question?
https://www.mathhomeworkanswers.org/240872/0-for-is-odd-1-2n-1-n-test-this-series-answers-or-question?show=240916#a240916
The terms in the series are: 1, 1/3, 1/25, 1/343, 1/6561, 1/161051, 1/4826809, ...<br />
<br />
All the denominators will be odd whatever the value of n.<br />
<br />
Is the set supposed to represent coordinates?Calculus Answershttps://www.mathhomeworkanswers.org/240872/0-for-is-odd-1-2n-1-n-test-this-series-answers-or-question?show=240916#a240916Wed, 19 Apr 2017 21:50:27 +0000Answered: How are the values of the 3's in 13,407.036 related?"
https://www.mathhomeworkanswers.org/240892/how-are-the-values-of-the-3s-in-13-407-036-related?show=240912#a240912
<p style="text-align: justify;">One 3 is in the 1000s position while the other 3 is in the hundredths position. The first 3 is 100,000 times the second in value.</p>Other Math Topicshttps://www.mathhomeworkanswers.org/240892/how-are-the-values-of-the-3s-in-13-407-036-related?show=240912#a240912Wed, 19 Apr 2017 21:13:58 +0000Answered: How many tenths are in 825 hundredths
https://www.mathhomeworkanswers.org/240871/how-many-tenths-are-in-825-hundredths?show=240911#a240911
<p style="text-align:justify">825/100=8.25. There are 2.5 tenths in this number, because 2.5 tenths is 25 hundredths. In the tenths position there is a 2. 82.5 tenths is 82.5/10=8.25; 8.25/0.1=82.5 so there are 82½ tenths in 825 hundredths.</p>Other Math Topicshttps://www.mathhomeworkanswers.org/240871/how-many-tenths-are-in-825-hundredths?show=240911#a240911Wed, 19 Apr 2017 21:08:08 +0000Answered: what is the value of 4 in 742?
https://www.mathhomeworkanswers.org/131868/what-is-the-value-of-4-in-742?show=240893#a240893
Tens placeOther Math Topicshttps://www.mathhomeworkanswers.org/131868/what-is-the-value-of-4-in-742?show=240893#a240893Wed, 19 Apr 2017 17:35:44 +0000Answered: I need to know what the common denominator for 3/41, 40/97, and 1/6 is.
https://www.mathhomeworkanswers.org/240855/i-need-to-know-what-the-common-denominator-for-41-40-97-and-6-is?show=240861#a240861
<p style="text-align: justify;">You only need the denominators to find the common denominator. Since 41, 97 and 6 have no factors in common the lowest common denominator is the product 41*97*6=23862. All the fractions can be expressed as multiples of 1/23862. 3/41=3*97*6/23862, 40/97=40*41*6/23862, 1/6=41*97/23862: 1746/23862, 9840/23862, 3977/23862.</p>Word Problem Answershttps://www.mathhomeworkanswers.org/240855/i-need-to-know-what-the-common-denominator-for-41-40-97-and-6-is?show=240861#a240861Tue, 18 Apr 2017 23:38:31 +0000Answered: how many have both rabbit and cat
https://www.mathhomeworkanswers.org/240852/how-many-have-both-rabbit-and-cat?show=240858#a240858
<p><img alt="" src="https://www.mathhomeworkanswers.org/?qa=blob&qa_blobid=2163861891564448332" style="height:417px; width:400px"></p>
<p>The Venn diagram above is split into 8 regions labelled A-H.</p>
<p style="text-align:justify">Each letter represents the number of people in the group. For example, B, C and D represent the number of people owning only a rabbit, cat or dog respectively.</p>
<p style="text-align:justify">In this problem the interlocking parts of the central circles represent owners of more than one pet.</p>
<p>B+G+H+E=16 rabbit owners</p>
<p>E+H+F+D=24 dog owners</p>
<p>G+H+F+C=17 cat owners</p>
<p>H=2 cat, dog and rabbit owners</p>
<p>F=cat and dog owners, G=cat and rabbit owners, F=G+1</p>
<p>E=9 dog and rabbit owners</p>
<p>A=0 do not own a dog, cat or rabbit</p>
<p style="text-align:justify">There is an ambiguity about the 39 pet owners: does this mean they own no more than one of cat, dog or rabbit; or it means they own at least one type of pet? In the first case B+C+D=39; in the second case B+C+D+E+F+G+H=39.</p>
<p style="text-align:justify">Now we can begin to plug in figures.</p>
<p style="text-align:justify">B+G=16-2-9=5, F+D=24-2-9=13, and G+1+D=13, so G+D=12</p>
<p style="text-align:justify">G+H+F+C=17; G+2+G+1+C=17; 2G+C=14</p>
<p style="text-align:justify">If we assume B+C+D+E+F+G+H=39, then (B+G)+(G+1+D)+(C+9+2)=39</p>
<p style="text-align:justify">5+13+C+11=39; C=39-(5+13+11)=39-29=10; 2G+C=14, so 2G=14-10=4 and G=2; and so there are 2 cat and rabbit owners. (Also, since B+G=5, B=3 who only own a rabbit; and D=12-2=10 only own a dog.)</p>Other Math Topicshttps://www.mathhomeworkanswers.org/240852/how-many-have-both-rabbit-and-cat?show=240858#a240858Tue, 18 Apr 2017 22:56:12 +0000Answered: what is the length of each snake
https://www.mathhomeworkanswers.org/240847/what-is-the-length-of-each-snake?show=240854#a240854
<p style="text-align: justify;">B=3.52+A and C=7.27+A; total length of all the snakes is 3.52+A+7.27+A+A=46.79.
<br>
<br>
10.79+3A=46.79, 3A=36, A=12"; B=15.52"; C=19.27".</p>Word Problem Answershttps://www.mathhomeworkanswers.org/240847/what-is-the-length-of-each-snake?show=240854#a240854Tue, 18 Apr 2017 22:32:07 +0000Answered: a die has two of its faces numbered 3.calculate the probability of obtaining a 1 or 3 on a single cast
https://www.mathhomeworkanswers.org/240836/faces-numbered-calculate-probability-obtaining-single-cast?show=240853#a240853
<p style="text-align: justify;">If there are two threes then there are 4 remaining numbers on a cubic die. So the probability is 2/6=1/3 of casting a 3.</p>
<p style="text-align: justify;">If there are 2 3s, one other number, 1, 2, 4, 5, 6 must be missing. If this number happens to be 1, then the probability of 1 is zero. The probability of 1 or 3 is 1/3.</p>
<p style="text-align: justify;">If the missing number is not 1, then the probability of casting 1 or 3 is 3/6=1/2, because three faces contain 1, 3 and 3, and three faces contain other numbers.</p>Other Math Topicshttps://www.mathhomeworkanswers.org/240836/faces-numbered-calculate-probability-obtaining-single-cast?show=240853#a240853Tue, 18 Apr 2017 22:27:50 +0000Answered: standard deviation of 5.3%, a sample of 15 and the sample standard deviation is 5.5% and mean return is 11.2%. Construct a 98% confidence interval for the mean
https://www.mathhomeworkanswers.org/240794/standard-deviation-standard-deviation-construct-confidence?show=240797#a240797
<p style="text-align:justify">The number of degrees of freedom for a sample size of 15 is 15-1=14. The t-value for a 98% confidence interval with 14 dof is 2.624. The margin of error is 2.624*5.5/√15=3.73, so the mean, m, is in the interval:</p>
<p style="text-align:justify">11.2-3.73≤m≤11.2+3.73, that is, 7.5%≤m≤14.9%. This describes the interval for the mean annual return.</p>Statistics Answershttps://www.mathhomeworkanswers.org/240794/standard-deviation-standard-deviation-construct-confidence?show=240797#a240797Mon, 17 Apr 2017 18:51:21 +0000Answered: Factorize x^3-x^2y^2+y^3+xy
https://www.mathhomeworkanswers.org/240793/factorize-x-3-x-2y-2-y-3-xy?show=240795#a240795
<p><em>Factorize x^3-x^2y^2+y^3+xy </em></p>
<p>This expression doesn't factorise.</p>
<p>But this one, x^3 - x^2y^2 + y^3 - xy , does.</p>
<p>x^2(x - y^2) + y(y^2 - x)</p>
<p>x^2(x - y^2) - y(x - y^2)</p>
<p><span style="text-decoration: underline;">It factorises as: (x - y^2)(x^2 - y)</span></p>Algebra 2 Answershttps://www.mathhomeworkanswers.org/240793/factorize-x-3-x-2y-2-y-3-xy?show=240795#a240795Mon, 17 Apr 2017 16:54:31 +0000Answered: Water flows through a 7cm pipe at the rate of 4m/s.how many cm³ of water flow through the pipe in one second
https://www.mathhomeworkanswers.org/240790/water-flows-through-rate-many-water-flow-through-pipe-second?show=240791#a240791
<p><em>Water flows through a 7cm pipe at the rate of 4m/s.how many cm³ of water flow through the pipe in one second </em></p>
<p>Diameter of pipe is D = 7 cm.</p>
<p>Cross sectional area of pipe is A= pi.(D^2)/4 cm^2</p>
<p>A = pi*49/4 = <span style="text-decoration: underline;">38.48 cm^2</span></p>
<p>Water flows at v = 4 m/s</p>
<p>Water flow rate is Q = Av = 38.48 * 4 = <span style="text-decoration: underline;">153.94 cm^3/s</span></p>
<p><span style="text-decoration: underline;"><strong>Q = 154 cm^3/s</strong></span> = 154 * 10^(-3) litres/s = 154 * 10^(-3)) / 60 litre/min</p>
<p><span style="text-decoration: underline;"><strong>Q = 0.0025656 l/min</strong></span></p>
<p>Sorry - multiplied by 1,000 instead of dividing by it.</p>Word Problem Answershttps://www.mathhomeworkanswers.org/240790/water-flows-through-rate-many-water-flow-through-pipe-second?show=240791#a240791Mon, 17 Apr 2017 11:47:51 +0000Answered: an orange is 7 cm in diameter,if 2/9 of it is made up of juice how much juice can you get from squeezing 7 similar such oranges?
https://www.mathhomeworkanswers.org/240786/orange-diameter-juice-much-juice-squeezing-similar-oranges?show=240789#a240789
<p><span style="text-decoration: underline;">an orange is 7 cm in diameter,if 2/9 of it is made up of juice how much juice can you get from squeezing 7 similar such oranges?</span><span style="text-decoration: underline;"> </span></p>
<p>Volume of orange is V = pi.D^2/4</p>
<p>V = pi*(7)^2/4 = <span style="text-decoration: underline;">49pi/4</span></p>
<p>2/9 of that volume is juice, i.e.</p>
<p><span style="text-decoration: underline;">Vj = 2V/9 = 49pi/18</span></p>
<p>Total volume from 7 such oranges is Vt, where</p>
<p>Vt = 7Vj = <span style="text-decoration: underline;">343pi/18</span></p>
<p><span style="text-decoration: underline;"><strong>Volume = 343pi/18 cm^3 = 59.86 cm^3</strong></span></p>Geometry Answershttps://www.mathhomeworkanswers.org/240786/orange-diameter-juice-much-juice-squeezing-similar-oranges?show=240789#a240789Mon, 17 Apr 2017 04:59:19 +0000Answered: If 3=18, 4=32, 5=50, 6=72, 7=98, Then 10= ?
https://www.mathhomeworkanswers.org/118132/if-3-18-4-32-5-50-6-72-7-98-then-10?show=240787#a240787
<p>I will be assuming they are using the relation operator for assignment rather than equality, as the former has more interesting consequences.</p>
<p>With a little effort we can come up with say,
<br>
(-(1/30))n^5+(5/6)n^4-(49/6)n^3+(247/6)n^2-(459/5)n+84 which results in,
<br>
18, 32, 50, 72, 98, 124, 138, 116, . . . .
<br>
——-
<br>
But,
<br>
——-
<br>
2n^2 gives
<br>
18, 32, 50, 72, 98, 128, 162, 200, . . . .
<br>
(The popular choice)
<br>
——
<br>
However,
<br>
—–
<br>
n^5-25n^4+245n^3-1173n^2+2754n-2520 gives
<br>
18, 32, 50, 72, 98, 248, 882, 2720, . . . .
<br>
—–
<br>
But then there is,
<br>
—–
<br>
(8/5)n^5-40n^4+392n^3-1878n^2+(22032/5)n-4032 that gives
<br>
18, 32, 50, 72, 98, 320, 1314, 4232, . . . .
<br>
—–
<br>
And then there is ….
<br>
… I can keep going all day, but I’ll just stop there.
<br>
—–
<br>
All these work, take your pick <img alt="</p>Other Math Topicshttps://www.mathhomeworkanswers.org/118132/if-3-18-4-32-5-50-6-72-7-98-then-10?show=240787#a240787Mon, 17 Apr 2017 03:55:24 +0000