They must make up their mind. Either they should never, or else they should always.
Answer 64
Step by step exploration
3*4*4+4*4=48+16=64
Answer: 70,000
Step-by-step explanation:
W = L - 15
WL = 76
(L-15)L = 76
L^2 - 15L - 76 = 0
(L-19)(L+4) = 0
L = 19 or -4
Since a length cannot be negative, the length must be 19 units.
The width is 19-15=4 units.
The answer to your problem is x=5