Question

Find f(4) if f(x) =5x-4

Answer 1

`f(x)=5x-4`

To find f(4) you substitute the x in the given equation for 4:

`\begin{gathered} f(4)=5(4)-4 \\ f(4)=20-4 \\ f(4)=16 \end{gathered}`Then, f(4) is 16