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3 years ago

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The perimeter of a rectangle is 72 cm. The length, 1, of the rectangle is 6cm longer than the width, e. What is the width of the

rectangle

1 answer:

ollegr [7]3 years ago

4 0

Width = 15 Length = 21. Hope this helps:)

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$\left\{\begin{array}{ccc}y=x^2+6x\\4x-y=-24\end{array}\right\\\\substitute:\\\\4x-(x^2+6x)=-24\\\\4x-x^2-6x+24=0\\\\-x^2-2x+24=0\\\\a=-1;\ b=-2;\ c=24\\\\\Delta=b^2-4ac$

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