Question

If f(x) = 5x-20 find f(y+2)​

Answer 1

f(y + 2) = 5y - 10

Explanation:

To evaluate f(y + 2), substitute x = y + 2 into f(x), that is

f(y + 2) = 5(y + 2) - 20

= 5y + 10 - 20

= 5y - 10