Chapter 6.7 Review

What is the correct way to use exponents to rewrite the expression below:

3x3x3x3x5x5

• $4^3$ x $2^5$

• $3^4$ x $5^2$

• $4^3$ + $2^5$

• $3^4$ + $5^2$

A plumber charges $10 for transportation and $55 per hour for repairs. Which expression can be used to find the cost in dollars for a repair that takes h hours?

• 10 + 55 + h

• 10h + 55

• 10 x 55h

• 10 + 55h

Ellen is 2 years older than her brother Luke. Let k represent Luke's age. Identify the expression that can be used to find Ellen's age.

• k - 2

• k +2

• 2k

• $\frac{k}{2}$

What is the value of  $4^3$ ? 

• 12

• 32

• 64

• 24

Anoushka is buying beans. She bought r pounds of red beans that cost $3 per pound and b pounds of black beans that cost $2 per pound. The total amount of her purchase is given by the expression 3r + 2b. Select the terms of the expression. Mark all that apply.

• 2

• 2b

• 3

• 3r

Choose the number that makes the sentence true. The formula V =  $s^3$  gives the volume V of a cube with side length s. The volume of a cube that has a side length of 8 inches is _____________ inches cubed.

• 24

• 64

• 512

• 256

Ms. Durchslag is ordering new chairs and cushions for her dining room table. A new chair costs $88 and a new cushion cost $12. Shipping costs $34. The expression 88c + 12c + 34 gives the total cost for buying c sets of chairs and cushions. What would be the correct way to simplify the expression by combining like terms?

• 100c + 34

• 134c

• 110c + 34

 Ms. Durchslag writes the expression 5 x  $\left(2\ +1\right)^2$   $\div$  3 on the board. What would be the correct answer when evaluating the expression?

• 5

• 10

• 15

• 225

Jayen writes this word expression:

the product of 7 and m

What would be the answer to this expression if m = 4?

• 11

• 28

• 1.75

• 3

Isabella has some bags that each contain 12 potatoes. She takes 3 potatoes from each bag. The expression 12p - 3p represents the number of potatoes p left in the bags. What would be the simplified expression after combining like terms?

• 15p

• 13p

• 11p

• 9p