SOLUTION: Let f(x)=4+5x and g(x)=2x-1. Find f(g(x)) and g(f(x)). If you could explain how to get this answer, I would greatly appreciate! I know how to find f*g and f/g and simple thing

Algebra ->  Rational-functions -> SOLUTION: Let f(x)=4+5x and g(x)=2x-1. Find f(g(x)) and g(f(x)). If you could explain how to get this answer, I would greatly appreciate! I know how to find f*g and f/g and simple thing      Log On


   

Question 308935: Let f(x)=4+5x and g(x)=2x-1. Find f(g(x)) and g(f(x)).
If you could explain how to get this answer, I would greatly appreciate! I know how to find f*g and f/g and simple things like that but the parenthesis are confusing me!
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
Try this!
f%28x%29+=+4%2B5x
g%28x%29+=+2x-1
highlight%28f%28g%28x%29%29%29+=+f%282x-1%29=4%2B5%2A%282x-1%29+=+4%2B10x-5=highlight%2810x-1%29
highlight_green%28g%28f%28x%29%29%29+=+g%284%2B5x%29=2%284%2B5x%29-1+=+8%2B10x-1=highlight_green%2810x%2B7%29