Answer:
The first one is either 88 feet or 90 feet
Step-by-step explanation:
He wrote identity instead of commutative in step 4
A) w + 7 = L
B) w * L = 120
A) w = L -7 then substituting this into B)
(L-7) * L = 120
L² -7L = 120
L² -7L -120 = 0
Solving by quadratic Formula:
L1 = 15
L2 = -8
If length = 15, then width = 8
Answer:
148 inches
Step-by-step explanation:
8 • 12 = 96 + 52 = 148
A foot is 12 inches, and when converting to a smaller unit, you multiply. So, your answer is 148 inches.
Hope this helps! :)