Question

What is the value of f[g(4)] for f(x)=2x+1 and g(x)=2x-5

Answer 1

Your first step is to find g(4)

g(x) = 2x - 5

g(4) = 2(4) - 5 ... replace every 'x' with 4

g(4) = ???

Answer 2

tell me what you get

Answer 3

@Twig02

Hmm,Just plug in 4 and find g(4) first like jim showed

Answer 4

g(4)=3

Answer 5

now that you know g(4) is 3, you can go from

f[g(4)]

to

f(3)

So what is f(3) ?

Answer 6

f(3)=7

Answer 7

so in the end, f[g(4)] = 7

Answer 8

thanks

Answer 9

yw