CPT Review 4/17/01 

 

12 

9. 

B 

Solve for 

x

: 3

1

6

(

)

x

+ = −

 

 

 

 

(

)

( )

( )

3

3

9

3

3

9

3

3

6

3

3

3

6

3

3

6

1

3

−

=

−

=

−

=

−

−

=

−

+

−

=

+

−

=

+

x

x

x

x

x

x

 

 
10.   A 

Add the polynomials:  

b

a

b

a

7

5

3

2

−

+

+

 

 

 

 

b

a

b

a

b

a

b

a

4

7

)

7

3

(

)

5

2

(

7

5

3

2

−

−

+

+

−

+

+

 

11.  A 

Subtract the polynomials:     

(

) (

)

2

2

3

11

4

9

2

2

+

−

−

+

−

x

x

x

x

 

 

 

 

(

) (

)

9

2

6

2

2

3

11

4

9

2

2

3

11

4

9

2

2

2

2

+

−

−

+

−

+

−

+

−

−

+

−

x

x

x

x

x

x

x

x

x

x

 

 
 
12. 

A 

(

)

(

)

4

2

2

2

+

−

+

x

x

x

 

 

 

 

(

)

(

)

8

8

0

0

8

4

2

4

2

4

2

2

x

 

3

2

3

2

2

3

2

+

+

+

+

+

−

+

+

−

+

−

+

x

x

x

x

x

x

x

x

x

x

x

 

 
 

13.  B  The difference of twice a number and six is four times the number.   
 

 

Find an equation to solve for the number. 

 

 

 

x

x

4

6

2

    

Therefore

equal

 

means

 

is

 

subtract,

 

means

 

Difference

=

−