SOLUTION: Find (g o f)(3) if g(x) = 3x and f(x) = x - 3 Unfortunately, I can't solve it.

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Question 544193: Find (g o f)(3) if g(x) = 3x and f(x) = x - 3 Unfortunately, I can't solve it.
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
Find (g o f)(3) if g(x) = 3x and f(x) = x - 3
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(g o f)=g[f(x)]=3(x-3)=3x-9
(g o f)(3)=9-9=0