Which of the following pairs of functions are inverses of eachother?

Answer:
D.
Step-by-step explanation:
When you plug g(x) into f(x), your output is x, which is the correct output for when 2 functions are inverses of each other:
(f of g)(x) = [tex]\frac{4(x+8)-9-8}{4} +9[/tex]
= (x + 8) -9 - 8 + 9
= x + 8 - 8
= x