Question

If f(x)=5x+8 and get g(x)=4x-1, find f(g(x))

Answer 1

insert g(x) into the spot of "x" within f(x)

Answer 2

f(g(x))=5(g(x))+8

and g(x)=4x-1 sooo....

f(g(x))=5(4x-1)+8 and simplify as wanted

Answer 3

that's what I though. Thanks :)

Answer 4

sooo....
f(g(x))= 20x+3

Answer 5

now if I'm finding that for g(f(3)) what do I do?

Answer 6

basically same thing. plug in 3 for value of x once u find g(f(x)) 4(5(3)+8)-1, 4(15+8)-1, 4(23)-1, 92-1=91