Module 3 Review

4x + 8 = 5x +3

x = ?

7/9d - 6 = 8/9d -10

d = ?

Tags

CCSS.8.EE.C.7B

-3.6x + 4.5 = 2.4x + 22.5

x = ?

-0.25a + 18.5 = 0.5a + 3.5

a = ?

Two companies offer Janeen a sales position. Company A pays $4,000 per month plus $400 per car sold. Company B pays $3,750 per month plus $450 per car sold. Which equation could be used to determine the number of cars sold in a month, x, that would result in the same total income from each company?

• 4,000 + 400x = 3,750 + 450x

• 4000 - 400x = 3,750 - 450x

• 4000x + 400 = 3,750x + 450

• 4000x - 400 = 3,750x - 450

Keith wants to have a laptop case shipped to his office. Company A charges $12 shipping fee and $1.50 per pound. Company B charges a $15 shipping fee and $1 per pound. For how many pounds is the cost of both shipping companies the same. Use the equation from this problem to answer the next question.

• 12p + 1 = 15p + 1.5

• 12p + 1.5 = 15p + 1

• 12 + p = 15 + 1.5p

• 12 + 1.5p = 15 + p

Solve the equation from last queston.

p =?

Tags

CCSS.6.EE.B.7

The temperature of one furnace is 1,500 degrees C and cools at a rate of 20 degrees per minute. The temperature of another furnace is 1,200 degrees C and is heated at a rate of 10 degrees C per minute. After how many minutes will the furnaces be the same temperature?

m = ?

Tags

CCSS.8.EE.C.8C

3(6x -1) + 4x = 4(3x -1) -5

x =?

Tags

CCSS.8.EE.C.7B

0.2(4x + 10) -0.9x = 0.2(x -6) = 12.2

x =?

Round the nearest tenth

Tags

CCSS.8.EE.C.7B