If f (z) = - 7 (z+4) - 7 find f (3)

Let's look at the equation first. We need to find what the output is when z=3.

-7 (3+4); now, all we need to do is follow the order of operations in order to get the correct answer.

-7 (3+4) → - 7*7 → - 49-7→-56

So f (3) = -56