The point (4, -2) is the solution to which of the following system of equations?
help me solve this someone?
The point (4, -2) is the solution to which of the following system of equations?
A) Y =-X +2
Y = 4X -2
B) Y = -X + 2
Y= -2 +4
C) Y = X -2
Y = X-6
D) Y =2X -10
Y = X -6
All you have to do is substitute the values of x and y, given as the point,
into the equations and find out which set works.
A) Y =-X +2 -2 = -(4) + 2 -2 = -2
Y = 4X -2 -2 = 4(4) - 2 -2 = 16 - 2 -2 = 14
A does not work.
B) Y = -X + 2 -2 = -(4) + 2 -2 = -2
Y= -2 +4 -2 = -2 + 4 -2 = 2
B does not work
C) Y = X -2 -2 = 4 - 2 -2 = 2
Y = X-6 -2 = 4 - 6 -2 = -2
C does not work
D) Y =2X -10 -2 = 2(4) - 10 -2 = 8 - 10 -2 = -2
Y = X -6 -2 = 4 - 6 -2 = -2
D works, so the point (4, -2) is the solution to the system of equations in D