SOLUTION: I need help performing the indicated operation f(x)=5x+15, g(x)=3x-1 I need to find (f og)(x)

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Question 127192: I need help performing the indicated operation
f(x)=5x+15, g(x)=3x-1
I need to find (f og)(x)
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Remember, (f o g)(x) means f(g(x))

f%28x%29=5x%2B15 Start with the first function



f%28g%28x%29%29=5%283x-1%29%2B15 Plug in g%28x%29=3x-1. In other words, replace each x in f(x) with 3x-1


f%28g%28x%29%29=15x-5%2B15 Distribute


f%28g%28x%29%29=15x%2B10 Combine like terms