document.write( "Question 360181: consider all rectangles with an area of 200 meters squared. let x be the length of one side of such a rectangle. a) express the perimeter P as a function of x. b) find the dimensions of a rectangle whose perimeter is 70 m \n" ); document.write( "

Algebra.Com's Answer #256996 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi,
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document.write( "*Note: Area of a rectangle is l*w
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document.write( "let x be the length a rectangles with an area of 200 meters squared
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document.write( "x*w = 200m^2
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document.write( "w= 200m^2/x\r
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document.write( "a) express the perimeter P as a function of x.
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document.write( "P(x) = 2*x + 2*(200m^2/x)\r
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document.write( "b) find the dimensions of a rectangle whose perimeter is 70 m
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document.write( "70m = 2x + 400m^2/x
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document.write( "70x = 2x^2 + 400m^2
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document.write( "0= 2x^2 -70x + 400m^2
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document.write( "0= x^2 -35x + 200m^2\r
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