document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=836685>Question 836685</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a 20-ft by 40-ft rectangular swimming pool is surrounded by a walkway of uniform width. if the total are of walkway is 544 ft^2, how wide is the walkway </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #504345 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39617)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=504345\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Two-D pool area not including walls, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=20%2A40%2Aft%5E2 ALIGN=MIDDLE  ALT=\"20%2A40%2Aft%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" >. <BR>\n" );
document.write( "The pool area AND the walkway combined area, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%2820%2B2w%29%2840%2B2w%29 ALIGN=MIDDLE  ALT=\"%2820%2B2w%29%2840%2B2w%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > and we do not yet know the value.  The unknown variable w is the walkway width.\r<BR>\n" );
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document.write( "We can say THIS:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%2820%2B2w%29%2840%2B2w%29-20%2A40=544 ALIGN=MIDDLE  ALT=\"%2820%2B2w%29%2840%2B2w%29-20%2A40=544\"   DISABLED_style= \"max-width:90%; height:auto;\" >; this must be understood before continuing.\r<BR>\n" );
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document.write( "READY?\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4%2810%2Bw%29%2820%2Bw%29-4%2A5%2A40=544 ALIGN=MIDDLE  ALT=\"4%2810%2Bw%29%2820%2Bw%29-4%2A5%2A40=544\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%2810%2Bw%29%2820%2Bw%29-5%2A40=136 ALIGN=MIDDLE  ALT=\"%2810%2Bw%29%2820%2Bw%29-5%2A40=136\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=200%2B30w%2Bw%5E2-200-136=0 ALIGN=MIDDLE  ALT=\"200%2B30w%2Bw%5E2-200-136=0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%28w%5E2%2B30w-136=0%29 ALIGN=MIDDLE  ALT=\"highlight_green%28w%5E2%2B30w-136=0%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "136=34*4, factoring is a good method for the quadratic.<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28w-4%29%28w%2B34%29=0 ALIGN=MIDDLE  ALT=\"%28w-4%29%28w%2B34%29=0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "The only sensible solution is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28w=4%29 ALIGN=MIDDLE  ALT=\"highlight%28w=4%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > feet. </SPAN>\n" );
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