Unit 3 Quiz Review

1

100

Inverse Operation of Multiplication

Division

200

Solve for x AND check your work

 0.4x + 2.9 = 1.5

x = 3.5

300

Which operation will isolate the variable x in the equation   5x=10?

Dividing by 5 on both sides

400

Dividing by a fraction is equivalent to multiplying by its ________________.

Reciprocal

500

Solve for x AND check your answer:

2 -2.5x= –23

x=10

2

100

Inverse Operation of Addition

Subtraction

200

When solving equations, you need to isolate the _________________.

Variable

300

Solve for n AND check your work:

-15 -5n =20

x=-7

400

True or False: 

In the equation 9x + 4 = 25, x = 3 

False

500

Solve for x AND check your work:

-5+0.8x=7

x=2.5

3

100

Inverse Operation of Subtraction

Addition

200

Solve for x AND check your work:

-4x-1.50=18.50    

x=-5

300

Solve for a AND check your work:

3a-12= -20

a=-2.6 repeating

400

What does it mean when an equation is "open"

It includes at least one variable.

500

Solve for x:

3/4x -3/5 =1/5

x=16/15

4

100

Inverse Operation of Division

Multiplication

200

Does b= –2 make the equation  –2b+4=0 true or false? Justify your answer. 

True (must show your work)

300

solve for x AND check your work:

3x + 9 = 15

x = 2

400

Solve for x AND check your work 

0.25x-4=1  

x=20

500

Solve for x:

1/6x +5/12 =11/12

x=3