algebra mid-unit review quiz Unit 3 lesson 5

1. simplify the rational expression; 2m^2 - 72/ m - 6.

A. 2 ( m+6)
B. 2
C. 2 ( m-6)
D. m + 12

2. simplify the rational expression; -8z^2/ z^4 - z^2.

A. -8z
B. -8
C. -8/ z^2
D. -8/ z^2 - 1

3. simplify the rational expression; 6x-54/ 7x-63.

A. - 6/7
B. 6/7
C. 6(x-9)/ 7
D. 6/ 7 (x-9)