7.6-7.9 Review

Oliver drives 45 miles per hour. What is the expression that represents the distance in miles he will travel for h hours driven?

• 45 + h

• 45 - h

• 45h

• 45 / h

Socks cost $5 per pair. The expression 5p represents the cost in dollars of p pairs of socks. Why must p be a whole number?

• Because socks can only be bought in whole pairs.

• Because the cost of socks is always a whole number.

• Because p represents the price of a single sock.

• Because the expression 5p can only be calculated with whole numbers.

What decimal represents the portion of silver in sterling silver?

• 0.925

• 0.75

• 0.5

• 0.999

How many pints are equivalent to 3 gallons?

• 24 pints

• 30 pints

• 36 pints

• 48 pints

• Addition

• Subtraction

• Exponentiation

• Multiplication

Evaluate the algebraic expression h(m + n) ÷ 2 for h = 4, m = 5, and n = 6.

• 10

• 11

• 20

• 22

For each gym class, a school has 10 soccer balls and 6 volleyballs. All of the classes share 15 basketballs. The expression 10c + 6c + 15 represents the total number of balls the school has for c classes. What is a simpler form of the expression?

• 16c + 15

• 10c + 6c

• 15c + 10

• 10c + 15

A public library wants to place 4 magazines and 9 books on each display shelf. The expression 4s + 9s represents the total number of items that will be displayed on s shelves. Simplify this expression.

• 13s

• 4s + 9

• 9s + 4

• s(4 + 9)

A bag has 8 bagels. Three of the bagels are cranberry. What percent of the bagels are cranberry?

• 37.5%

• 25%

• 50%

• 12.5%

How many kilograms are equivalent to 3,200 grams?

• 3.2 kg

• 3.0 kg

• 3.5 kg

• 3.8 kg