Surface area is the area of all the sides added up. If you were to unfold all the areas and make it flat (2-D), area is

.
Volume would be cubed because it's 3-D
Answer:
x = 7
Step-by-step explanation:
<u>Distribute </u>-
12x − 66 + 15 = 3x + 12
<u>Combine Numbers and Variables</u> -
12x - 51 = 3x +12
<u>Get x on one side (isolate x)</u> -
9x - 51 = 12
9x = 63
<u>Divide 9</u> -
x =7
Answer:
78
Step-by-step explanation:
Answer: A
Step-by-step explanation: