document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=615076>Question 615076</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A swimming pool that is 8m wide by 10m long is surrounded by a sidewalk of uniform width. The area of the sidewalk is 72m^2 by itself. Find the width of the sidewalk and the outer dimensions of th sidewalk to the nearest hundredth of a meter </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #386940 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=386940\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The area of the swimming pool is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+8%2A10+=+80+ ALIGN=MIDDLE  ALT=\"+8%2A10+=+80+\"   DISABLED_style= \"max-width:90%; height:auto;\" > m2<BR>\n" );
document.write( "The area of the walkway is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+72+ ALIGN=MIDDLE  ALT=\"+72+\"   DISABLED_style= \"max-width:90%; height:auto;\" > m2<BR>\n" );
document.write( "The total area is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+80+%2B+72+=+152+ ALIGN=MIDDLE  ALT=\"+80+%2B+72+=+152+\"   DISABLED_style= \"max-width:90%; height:auto;\" > m2<BR>\n" );
document.write( "Let the width of the sidewalk = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+x+ ALIGN=MIDDLE  ALT=\"+x+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "The combined width is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+8+%2B+2x+ ALIGN=MIDDLE  ALT=\"+8+%2B+2x+\"   DISABLED_style= \"max-width:90%; height:auto;\" > m<BR>\n" );
document.write( "The combined length is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+10+%2B+2x+ ALIGN=MIDDLE  ALT=\"+10+%2B+2x+\"   DISABLED_style= \"max-width:90%; height:auto;\" > m<BR>\n" );
document.write( "Now I can say<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28+8+%2B+2x+%29%2A%28+10+%2B+2x+%29+=+152+ ALIGN=MIDDLE  ALT=\"+%28+8+%2B+2x+%29%2A%28+10+%2B+2x+%29+=+152+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+4%2A%28+4+%2B+x+%29%2A%28+5+%2B+x+%29+=+152+ ALIGN=MIDDLE  ALT=\"+4%2A%28+4+%2B+x+%29%2A%28+5+%2B+x+%29+=+152+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+20+%2B+5x+%2B+4x+%2B+x%5E2+=+38+ ALIGN=MIDDLE  ALT=\"+20+%2B+5x+%2B+4x+%2B+x%5E2+=+38+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+x%5E2+%2B+9x+-+18+=+0+ ALIGN=MIDDLE  ALT=\"+x%5E2+%2B+9x+-+18+=+0+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Use quadratic formula<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+%28-b+%2B-+sqrt%28+b%5E2+-+4%2Aa%2Ac+%29%29+%2F+%282%2Aa%29+ ALIGN=MIDDLE  ALT=\"x+=+%28-b+%2B-+sqrt%28+b%5E2+-+4%2Aa%2Ac+%29%29+%2F+%282%2Aa%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" > <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+a+=+1+ ALIGN=MIDDLE  ALT=\"+a+=+1+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+b+=+9+ ALIGN=MIDDLE  ALT=\"+b+=+9+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+c+=+-18+ ALIGN=MIDDLE  ALT=\"+c+=+-18+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+x+=+%28-9+%2B-+sqrt%28+9%5E2+-+4%2A1%2A%28-18%29+%29%29+%2F+%282%2A1%29+ ALIGN=MIDDLE  ALT=\"+x+=+%28-9+%2B-+sqrt%28+9%5E2+-+4%2A1%2A%28-18%29+%29%29+%2F+%282%2A1%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" > <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+x+=+%28-9+%2B-+sqrt%28+81+%2B+72+%29%29+%2F+2+ ALIGN=MIDDLE  ALT=\"+x+=+%28-9+%2B-+sqrt%28+81+%2B+72+%29%29+%2F+2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+x+=+%28-9+%2B-+sqrt%28+153+%29%29+%2F+2+ ALIGN=MIDDLE  ALT=\"+x+=+%28-9+%2B-+sqrt%28+153+%29%29+%2F+2+\"   DISABLED_style= \"max-width:90%; height:auto;\" > <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+x+=+%28-9+%2B+12.37%29+%2F+2+ ALIGN=MIDDLE  ALT=\"+x+=+%28-9+%2B+12.37%29+%2F+2+\"   DISABLED_style= \"max-width:90%; height:auto;\" > ( can't use the negative square root )<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+x+=++3.37%2F2+ ALIGN=MIDDLE  ALT=\"+x+=++3.37%2F2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+x+=+1.69+ ALIGN=MIDDLE  ALT=\"+x+=+1.69+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "and<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2x+%2B+8+=+3.38+%2B+8+ ALIGN=MIDDLE  ALT=\"+2x+%2B+8+=+3.38+%2B+8+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2x+%2B+8+=+11.38+ ALIGN=MIDDLE  ALT=\"+2x+%2B+8+=+11.38+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "and<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2x+%2B+10+=+3.38+%2B+10+ ALIGN=MIDDLE  ALT=\"+2x+%2B+10+=+3.38+%2B+10+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2x+%2B+10+=+13.38+ ALIGN=MIDDLE  ALT=\"+2x+%2B+10+=+13.38+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "The width of the walkway is 1.69 m<BR>\n" );
document.write( "The dimensions are 11.38 x 13.38 m2<BR>\n" );
document.write( "check:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+11.38%2A13.38+=+152.26+ ALIGN=MIDDLE  ALT=\"+11.38%2A13.38+=+152.26+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+152.26+-+72+=+80.26+ ALIGN=MIDDLE  ALT=\"+152.26+-+72+=+80.26+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "This looks close enough<BR>\n" );
document.write( "   <BR>\n" );
document.write( " \r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "  </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );