Chapter 4 Equations Only OST Review (7th grade)

A bowling alley charges x dollars per guest and a fixed $50 rental fee for parties.

Which equation represents the total cost, y, for 9 guests?

• y = 9x

• y = 9x + 41

• y = 9x + 50

• y = 50x + 9

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2016 #8

One apple cost costs $0.55 at the grocery store. Customers receive one free apple for every 8 apples that they buy. Anna paid a total of $8.80 for her apples. How many free apples did Anna receive?

Mathematical Equivalence

ON

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2016 #13

The perimeter of a regular 6-sided figure is 30 units, and the length of each side is x + 1 units.

What is the value of x?

Mathematical Equivalence

ON

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2017 #4

Mary goes to the bakery with $35. She purchases 2 loaves of bread for $3 each and a cake $15. She plans to spend the remainder of her money on cookies that cost $1.25 each.

What is the greatest number of cookies that Mary can buy?

Mathematical Equivalence

ON

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2018 #31

Keith purchases a cell phone plan, which includes a cell phone and a cell phone service. He makes a deposit of $100 for the cell phone and then pays $45 per month for the cell phone service.

Create an equation to model the total amount of money, y, in dollars, Keith spends on the cell phone and plan after x months. y=

Mathematical Equivalence

ON

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2018 #35 Part A

How much money does Keith spend per year for cell phone service?

Mathematical Equivalence

ON

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2018 #35 Part B

George has saved $264 but now needs $1800 for a down payment on a car. George works 32 hours every week and earns $16 per hour. He will deposit half of his weekly earnings into his bank account each week.

Part A. Complete the equation that George can use to find after how many weeks, w, he will have $1800 in his bank account. _____ + _____w = 1800

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2022 #39 Part A

Part B. After solving for w in part A, George decided to save more money each week so that he will have saved the $1800 two weeks earlier than in part A.

What is the additional amount of money, in dollars, George should save each week? Round the answer to the nearest cent as needed.

Mathematical Equivalence

ON

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2022 #39

• He divided 16 by 4.

• He added 12 to each side of the equation.

• He divided each side of the equation by 4.

• He subtracted 12 from each side of the equation.

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2019 #38

Daisy and Eva have $115 total to spend at a park. It costs $7.50 each to get into the park, and $25 per hour to rent one jet ski. What is the maximum amount of time Daisy and Eva can rent two jet skis?

Mathematical Equivalence

ON

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2023 #48