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

asked Aug 20, 2015 134k views

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

Mirza Delic answered Aug 22, 2015

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$the \ width : \ x \\ the \ length : \ y \\ The area : \ A=85 \\ \\A=xy \\ \\85=xy\\ \\y= (85)/(x)$

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