Question

HELP PLEASE, I don't understand this at all!

Answer 1

Given
`f(x)=8x-9`, they want you to find
`f(4).`

This is basically evaluating a function. Simply put 4 into x of the function.

Hence,

`f(4)=8(4)-9=23`

ANSWER: 23

Answer 2

f(x) = 8x-9

f(4)

let x=4 and substitute in

f(4) = 8*4 -9

f(4) = 32-9

f(4) = 23