Answer:

Step-by-step explanation:
The first step is to ensure that all of the fractions have a common denominator.

Hope this helps!
<span>The total surface area is SA = 6 </span>×

;
SA = 6 ×

= 6 × 81 = 486

;
I think 90 im not sure tho i searched it up
Answer:
Step-by-step explanation:
{ - 9, - 4, - 1}