Answer:
21w+3
Step-by-step explanation:
5w+9w+5+7w-2
14w+5+7w-2
21w+3
Answer:
x=-5, y=-5. (-5, -5).
Step-by-step explanation:
-x-5y=30
10x+5y=-75
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9x=-45
x=-45/9
x=-5
-(-5)-5y=30
5-5y=30
5y=5-30
5y=-25
y=-25/5
y=-5
Step-by-step explanation:
Let the side parallel to the river be x meter and the other two sides be of y meter, then
The area of the rectangle is
Substitute into to express the area in a single variable x as,
Differentiate A(x) with respect to x and equate to zero as,
x=150
Here, at is maximum
Therefore, the dimension is:
Length of side parallel to the river: x=150 m.
Length of other two side: m.
X=4 because 4 is half of 8 and the x side is half of the side with a length of 8.