Question

4 (y + z); use y = 5 and z = 4

Answer 1

y=5 z = 4 - substitution

4 (5 + 4) = 4 (9) = 36

Answer 2

It is 9

Explanation:

`4(y + z)`

when y is 5, z is 4

substitute:

`= 4(5 + 4) \\ = 36`