Answer:
D, B, C, and B
Step-by-step explanation:
I just did it
The third one duhhh, Ik this stuff
use cross products
(3r+6) *2 = 9*(2r-4)
6r+12 = 18r-36 distribute
12 = 12 r -36 subtract 6r from each side
48 = 12r add 36 to each side
4=r divide by 12