document.write( "Question 353592: Perimeter of a rectangle. A rectangle has a fixed width
\n" ); document.write( "and a variable length. Let P represent the perimeter and L
\n" ); document.write( "represent the length. P = 28 inches when L = 6.5 inches
\n" ); document.write( "and P = 36 inches when L = 10.5 inches. There is a linear
\n" ); document.write( "equation that expresses P in terms of L.
\n" ); document.write( "a) Find the equation.
\n" ); document.write( "b) What is the perimeter when L = 40 inches?
\n" ); document.write( "c) What is the length when P =215 inches?
\n" ); document.write( "d) What is the width of the rectangle?
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Algebra.Com's Answer #252719 by sofiyac(983) $\"\"$ $\"About$

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d) P=2L+2W, so we can easily find the width since it doesn't change by plugging in P=28 and L=6.5 and solving for W
\n" ); document.write( "28=2*6.5+2W
\n" ); document.write( "28=13+2W
\n" ); document.write( "15=2W
\n" ); document.write( "7.5=W So now we know what Width is.
\n" ); document.write( "a) The equation that expresses P in terms of L is P=2L+2W
\n" ); document.write( "b) P=2*40+2*7.5=80+15=95
\n" ); document.write( "c) 215=2L+2*7.5
\n" ); document.write( "215=2L+15
\n" ); document.write( "200=2L
\n" ); document.write( "100=L \n" ); document.write( "

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