Answer:
-8 + 7
Step-by-step explanation:
7 - 8 = -1
-8 + 7 = -1
Answer:
145 yards squared
Step-by-step explanation:
So the area of the base is area of a square with side length of 5 yards 
The area of one triangular face base times height divided by two and then simply multiplied by 4 because there are 4 triangular faces.

So the total surface area is
yards squared
Answer:
d)
because that would be the same as 
Answer:
C}
Step-by-step explanation: