B. 3 10 is the correct answer
L+8=W
L*W=65
sub W from the first equation to second one
L*(L+8)= 65
L^2+8L =65 L^2+8L -65 =0 L=-13 and L=5, length cannot be negative so L=5 is the answer
sub this value in the first equation W=13
Answer:
f^3 + 5f^2 +12f +8
Step-by-step explanation:
