Answer:
I'll do the first one and lets see if that helps
Step-by-step explanation:
Answer:
d = 5
Step-by-step explanation:
The difference between consecutive terms is
13 - 8 = 8 - 3 = 5 ← common difference d
Answer:
87 sq in
Step-by-step explanation:
Surface area of the net

If 1 box weighs 7.5 pounds, then we find the weight for 15 boxes with this equation:
15*7.5
Multiply:
112.5
15 boxes weight 112.5 pounds