document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=799971>Question 799971</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If the length of a rectangle is 4 feet more than its width. How do i use a variable to express the area of the rectangle? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #482882 by </B><A HREF=/tutors/aboutme.mpl?userid=jerryguo41><B>jerryguo41(197)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jerryguo41><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=jerryguo41><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=482882\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Set A=Area, l=length, and h=height<BR>\n" );
document.write( "You know that <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A=lw ALIGN=MIDDLE  ALT=\"A=lw\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Now after reading the problem you also know that <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=l=w%2B4 ALIGN=MIDDLE  ALT=\"l=w%2B4\"   DISABLED_style= \"max-width:90%; height:auto;\" > or \"length of a rectangle is 4 feet more than its width\"\r<BR>\n" );
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document.write( "Now replace l with w+4 and you get:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A=%28w%2B4%29w ALIGN=MIDDLE  ALT=\"A=%28w%2B4%29w\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A=w%5E2%2B4w ALIGN=MIDDLE  ALT=\"A=w%5E2%2B4w\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "If you want to only use one variable you can directly write it as <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A=%28x%2B4%29x ALIGN=MIDDLE  ALT=\"A=%28x%2B4%29x\"   DISABLED_style= \"max-width:90%; height:auto;\" > where x is implied to be the shorter side.<BR>\n" );
document.write( "Resulting in <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A=x%5E2%2B4x ALIGN=MIDDLE  ALT=\"A=x%5E2%2B4x\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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