Question

help I forgot how to do this :/
Let f(x)=4+5x and g(x)=2x-1. Find f(g(x)) and g(f(x))

Answer 1

plug the g(x) 2x-1 into the place of x in the f(x) equation, then do the opposite.

Answer 2

4+5(2x-1)

2(5+5x)-1

Answer 3

so distribute?

Answer 4

no

Answer 5

plugging in one function into another function

Answer 6

What you do, is find the answer to the equations. You are replacing the x value, for the values that are given. Like the other person said, you solve for 4+5(2x-1) and 2(5+5x)-1. So you would end up with 4+(10x-5) and 10+10x-1. So your two answers would be -1+10x and 9+10x