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Open Up - Grade 7 - Mathematics - Unit 6 - Lesson 12

By Formative Library
Last updated about 3 years ago
13 Questions

A backpack normally costs $25 but it is on sale for $21.
What percentage is the discount?(round to the nearest whole percent)

Find each product.

Find each product.

Find each product.

Find each product.

Select all expressions that show x increased by 35%.

Complete each sentence with the word discount, deposit, or withdrawal.

Clare took $20 out of her bank account. She made a _____.

Complete each sentence with the word discount, deposit, or withdrawal.

Kiran used a coupon when he bought a pair of shoes. He got a _____.

Complete each sentence with the word discount, deposit, or withdrawal.

Priya put $20 into her bank account. She made a _____.

Complete each sentence with the word discount, deposit, or withdrawal.

Lin paid less than usual for a pack of gum because it was on sale. She got a _____.

Here are two stories:
  • The initial freshman class at a college is 10% smaller than last year’s class. But then during the first week of classes, 20 more students enroll. There are then 830 students in the freshman class.
  • A store reduces the price of a computer by $20. Then during a 10% off sale, a customer pays $830.
Here are two equations:
0.9x + 20 = 830
0.9(x - 20) = 830

Decide which equation represents each story.

0.9(x - 20) = 830
The freshman class
0.9x + 20 = 830
The computer

Here are two stories:
  • The initial freshman class at a college is 10% smaller than last year’s class. But then during the first week of classes, 20 more students enroll. There are then 830 students in the freshman class.
  • A store reduces the price of a computer by $20. Then during a 10% off sale, a customer pays $830.
Here are two equations:
0.9x + 20 = 830
0.9(x - 20) = 830

Explain why one equation has parentheses and the other doesn’t

Here are two stories:
  • The initial freshman class at a college is 10% smaller than last year’s class. But then during the first week of classes, 20 more students enroll. There are then 830 students in the freshman class.
  • A store reduces the price of a computer by $20. Then during a 10% off sale, a customer pays $830.
Here are two equations:
0.9x + 20 = 830
0.9(x - 20) = 830

Solve each equation, and explain what the solution means in the situation.(round to the nearest cent)

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