What is the value of the expression mc015-1.jpg when n = 3?

Question

What is the value of the expression  when n = 3?

15

20

36

38

 

Comments

2. Which description is paired with its correct expression? 

four less than the quotient of a number cubed and seven, increased by three; 

five times the difference of a number squared and six; 

nine more than the quotient of six and a number cubed, decreased by four; 

twice the difference of nine and a number squared; 

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3. Which two operations are needed to write the expression that represents “five less than the quotient of a number and three”?

multiplication and subtraction

division and subtraction

multiplication and addition

division and addition

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4. Which expression correctly represents “ten times the difference of a number and six”?

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5. Which expression correctly represents “twice the sum of four and a number”?

Answer 1

5 questions:

1-2 20

2-4 2(9-n^2)

3-2 division and subtraction

4-1 10(n-6)

5-1 2(4+n)

Answer 2

Which could be used to evaluate the expression ?