Answer:
They all look right but i'm not sure about the last one?
Step-by-step explanation:
Answer:
240
Step-by-step explanation:
-8(10×-3)
(10×3)=30
30×-8=240
Answer:
7x21
Step-by-step explanation:
First, we need to find the length of the pool. Since it is three times as long as it is wide, it is 21 feet long (7 x 3 = 21). That way we can tell that it is 7x21, with a perimeter of 56 feet, and an area of 147 feet squared.