Answers and Explanations

ALGEBRA FOLLOW-UP TEST

1 . B

Plug    y   =   –2  into    the first   equation:

x   =   3−  y^2     =   3−(−2)^2    =   3−4 =   −1

2 . A

The sum of  four    identical   quantities  is  4   times   one of  those   quantities, so

the sum of  the four    terms   2x  is  4   times   2x:

2 x +   2x  +   2x  +   2x  =   4(2x)   =   2^2 (2x)    =   2x+2

3 . E

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

common:

4 .  B