Question

Find the value of f(4) for the function.f(a)=7(a+2)-9

Answer 1

To find the value of f(4) we need to substitute a = 4 into f(a), as follows:

`\begin{gathered} f(a)=7(a+2)-9 \\ f(4)=7(4+2)-9 \end{gathered}`

Applying the PEMDAS rule, first, we need to evaluate inisde the parentheses.

`f(4)=7\cdot6-9`

Next, we need to evaluate the multiplication.

`f(4)=42-9`

And finally, we need to calculate the subtraction.

`f(4)=33`