Given f(x) and g(x), find the indicated composition.f(x) = 5
; g(x) = 3x + 9Find (g ? f)(x).
A. (g ? f)(x) = 5
B. (g ? f)(x) = 5
+ 9
C. (g ? f)(x) = 5
D. (g ? f)(x) = 15
+ 9
Answer: D
Mathematics
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