document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=466972>Question 466972</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The perimeter of a rectangle is 28cm. Express the area of the rectangle in terms of the width x </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #321224 by </B><A HREF=/tutors/aboutme.mpl?userid=moshiz08><B>moshiz08(60)</B></A><img src=\"/images/stars/stars-08.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=moshiz08><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=moshiz08><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=321224\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Recall that the perimeter is the sum of the lengths of all sides. Also recall that opposite sides of a rectangle have the same length. Therefore \r<BR>\n" );
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document.write( "perimeter = width + length + width + length <BR>\n" );
document.write( "perimeter = 2 * width + 2 * length \r<BR>\n" );
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document.write( "The perimeter is 28 and the width is x, so we have \r<BR>\n" );
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document.write( "28 = 2*x + 2*length \r<BR>\n" );
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document.write( "Now we can solve for the length in terms of x. \r<BR>\n" );
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document.write( "2*length = 28 - 2*x \r<BR>\n" );
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document.write( "length = 14 - x \r<BR>\n" );
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document.write( "Finally since the area is \r<BR>\n" );
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document.write( "Area = length * width \r<BR>\n" );
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document.write( "the final expression in terms of x will be \r<BR>\n" );
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document.write( "Area = (14-x) * x = 14*x - x^2  </SPAN>\n" );
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