Question

15. What is the value of this expression when z=-4?
5z +9 - 4z

Answer 1

5

Explanation:

5z +9 - 4z

- All you have to do is substitute the value of z instead of the variable.

5(-4) + 9 - 4(-4)

-20 + 9 + 16

-11 + 16

5