Answer:
W = 15 ft. and L = 30 ft.
Step-by-step explanation:
Perimeter = 90 ft.
Twice as long as it is wide: L=2W
P = 2(L + W) = 2(2W + W) = 6W
90 = 6W
W = 15 ft. and L = 30 ft.
Answer:
-110
Step-by-step explanation:
-70 + -40 = -110
Both A and B are multiples of 5. So, I don't really understand but its either those two choices.
Sorry this doesn't really help much :/
You should use here the formula for combinations

In your case n=7, k=4, then

Answer: 35 ways, option A.
Answer:
0 true for all values
Step-by-step explanation: