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meriva
2 years ago
5

Please help me!!

Mathematics
1 answer:
zmey [24]2 years ago
4 0
I think it is answer D
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A farmer has 1,800 feet of fencing and wants to fence off a rectangular field that borders a straight river. he needs no fence a
astra-53 [7]
There are 2 short sides x and 1 long side y.

x+x+y=1,800
2x+y=1,800
y=1,800-2x

The area of the rectangle is A=x(1,800-x).


A is a function with variable x. Moreover it is a quadratic (second degree) function.

The graph of the function is a parabola which opens downwards, because the signs of the leading coefficients of the factors, multiply to minus:

(x)(-x)=-x^2.


This means that the highest point of the parabola, is its vertex V(h,k), so the function takes its largest value for x=h.


The roots of A=x(1,800-x) are x=0 and x=1,800, thus the x coordinate of the vertex, must be the midpoint of 0 and 1,800, that is 900.


Answer:

A=x(1,800-x)

largest area is when x=900

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3 years ago
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3 years ago
How many 30 degree angles does it take to make 180
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Answer:

If you use a search engine you will get the right answer.

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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