Answer:
D.
Step-by-step explanation:
Area=w*h
w*h=(2h)*(h)=2h^2
dA/dt=2(2h)=4h
dA/dt=4h dh/dt in^2/sec
The answer is 5, then you double check to make sure the solution is correct
5 = 15(3) - 40
5 = 45 - 40
5 = 5
Answer:
This is your child's quiz. In many schools this is against the rules and can result in suspension. If your child needs help, teach him, don't beg the internet for answers.
Answer:
(-3, 0)
Step-by-step explanation:
Let the width be w.
The length is 5 yd less than twice the width, so the length is 2w - 5.
The area is LW, and the area is 52 yd^2
LW = A
(2w - 5)(w) = 52
2w^2 - 5w = 52
2w^2 - 5w - 52 = 0
2w^2 - 13w + 8w - 52 = 0
w(2w - 13) + 4(2w - 13) = 0
(2w - 13)(w + 4) = 0
2w - 13 = 0 or w + 4 = 0
2w = 13 or w = -4
w = 6.5 or w = -4
Since a width cannot be a negative number, discard the solution w = -4.
The width is 6.5 yd.
The length is 2w - 5 = 2(6.5) - 5 = 13 - 8 = 8
The length is 8 yd.
The length is 8 yd, and the width is 6.5 yd.
