Question

For the expression 15-15z to have a negative​ value, what must be true about the value of ​z?

Choose the correct answer.

A. The value of z has to be 0.

B. The value of z has to be less than 1.

C. The value of z has to be greater than 1.

D.The value of z has to be negative.

Answer 1

C. The value of z has to be greater than 1

Explanation:

`15 - 15z < 0 \\ - 15z < - 15 \\ 15z > 15 \\ z > 1`