Question

Evaluate the expression when a=5 and b= -5.
-a +8b

Answer 1

-a + 8 b
-(5) + 8(-5)
-5 - 40
= -45

Answer 2

We would just have to plug the numbers where the variables are.
- (5) + 8(-5)
-5 + -40
- 45 is your answer