Question

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

Answer 1

`=13`

Explanation:

`f(x)=2x+1`
or
`f(4)=2(4)+1`
or
`f(4)=8+1`
or
`f(4)=9`
`g(x)=2x-5`
or
`g[f(4)]=g(9)`
or
`g(9)=2(9)-5`
or
`g(9)=18-5`
or
`g(9)=13`