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the area of the rectangle is 85 cm. express the perimeter of the rectangle is function of the width x.



Answer :

Lilith
[tex]the \ width : \ x \\ the \ length : \ y \\ The area : \ A=85 \\ \\A=xy \\ \\85=xy\\ \\y= \frac{85}{x}[/tex]


vaibhavay
f(x)=85-2(y)  I think it is so .

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