Answer:
f(fx) = 64x + 81
Step-by-step explanation:
f(x) = 8x + 9
f(fx) = 8(8x+9) + 9
= 64x + 72 + 9
= 64x + 81
(Correct me if i am wrong)
it's D
A: an exterior angle is supplementary to the adjacent interior angle.
