# Math

One hundred meters of fencing is available to enclose a rectangular area next to river give a function
A that can represent the area that can be enclosed, in terms of X?

1. 👍 13
2. 👎 3
3. 👁 5,212
1. let X equal the length along the river

so 50-X is the distance away from the river

A = 50 X - X^2

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2. 👎 2
2. Because the river is there, only 3 sides need to be fenced.

A = x ( 100 - 2 x ) =

100 x - 2 x ^ 2 =

2 ( 50 x - x ^ 2 )

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2. 👎 0
3. what if
A= ________x^2 + ______x

what should I insert?

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4. A(x)= 50x - x²/ 2

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2. 👎 4
5. f(a)= x+2y=100
f(a)=50x-0.5x²

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6. Why you use 2y,can you please clarify??

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2. 👎 0
7. lenght = x
width = y

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2. 👎 0

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