7th Grade Review (test 3-3)

Simplify the following expressions:

6ab - 4ab - 9ac - 5ab

• 3ab - 9ac

• -3ab + 9ac

• 16ab

• 15ab - 9ac

How much interest would be earned if you invested $400 for 2 years at a 6% rate?

I = prt

• $4800

• $48

Evaluate if x = 4, y = -6

4x - 2y + xy

• -20

• 52

• 4

• -56

Solve for y:

3y - 6 > 18

• y > 8

• y > 24

• y < 4

• y > 4

A submarine rose 500 ft. It's starting depth was 625 below sea level. What is the submarine's new depth?

• 1125 ft

• 125 ft

• 125 ft below sea level

• 1125 ft below sea level

Bob wants to get an 80% on his next exam. How many questions would he have to get right out of 50 questions to achieve his goal?

• 400 questions

• 40 questions

• 50 question

• 10 questions

The ratio of dogs to cat is 4:5. How many cats are there if there are 160 dogs?

• 200 cats

• 160 cats

• 40 cats

• 50 cats

Simplify:

5 - 2(4 - 6)² - 15

• -18

• -3

• 18

• 27

John went out to dinner with his friend. The bill came to $60.88. He wants to leave a 25% tip. How much in total would John leave?

• $15.22

• $76.10

• $45.66

Find the perimeter of a rectangle is the length is 4x + 6 and the width is 5x - 12.

• P = 9x - 6

• P = 18x - 12

• P = 18x - 6

• P = 18x + 36