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cat706
11.03.2021 •
Mathematics
I NEED HELP FOR ASSIGNMENT PLEASE
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Ответ:
1 add 8 to both sides
2 divide 2 sides by negative 8
3 multiply both sides by negative 8
4 subtract 8 from both sides
Step-by-step explanation:
Ответ:
2.divid 8 to both sides
3.multiply 8 on both sides
4.subtract 8 to both sides
Ответ:
A) A = 200w - w²
B) w = 100 yards
C) Max Area = 10000 sq.yards
Step-by-step explanation:
We are told that Robert has available 400 yards of fencing.
A) we want to find the expression of the area in terms of the width "w".
Since width is "w", and perimeter is 400,if we assume that length is l, then we have;
2(l + w) = 400
Divide both sides by 2 gives;
l + w = 200
l = 200 - w
Thus, Area of rectangle can be written as;
A = w(200 - w)
A = 200w - w²
B) To find the value of w for which the area is largest, we will differentiate the expression for the area and equate to zero.
Thus;
dA/dw = 200 - 2w
Equating to zero;
200 - 2w = 0
2w = 200
w = 200/2
w = 100 yards
C) Maximum area will occur at w = 100.
Thus;
A_max = 200(100) - 100(100)
A_max = 10000 sq.yards