SOLUTION: f(x)=3x, g(x)=x-5 in (fog)(2)

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Question 1188355: f(x)=3x, g(x)=x-5 in (fog)(2)
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

f%28x%29=3x, g%28x%29=x-5+
(fog)%282%29

first find (fog)%28x%29
(fog)%28x%29=f%28g%28x%29%29
(fog)%28x%29=f%28x-5+%29
(fog)%28x%29=3%28x-5+%29
(fog)%28x%29=3x-15
now find (fog)%282%29
(fog)%282%29=3%2A2-15+=6-15=-9