Evaluate the expression: (5a) 3 for a =-1

Question

-125
-120
125
120

Answer 1

Hello, Olivia!

 

Based on the given answer choices, I'm assuming the expression you have is:

 

(5a)³

 

For this expression, you are told a = -1.

 

We get:

 

[5(-1)]³

 

Another way of writing the above expression is:

 

(-5) * (-5) * (-5)

 

Which we can then begin to multiply out.

 

(-5)*(-5) = 25

25 * (-5) = -125

 

So, the answer is -125.