Answers and Explanations

ALGEBRA FOLLOW-UP TEST

1 . D

Plug    b   =   −2  into    the first   equation:

a   =   6   −   b^3     =   6   −   (−2)^3  =   6   −   (−8)    =   6   +   8   =   14

2 . B

The sum of  three   identical   quantities  is  3   times   one of  those   quantities, so  the sum of  the

three   terms   3z  is  3   times   3z:

3 z +   3z  +   3z  =   3(3z)   =   (3^1 )(3z)  =   3z+1

3 . E

Factor  the top and the bottom  and cancel  the factors they    have    in  common:

Multiplying by   ,  you get