document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1034413>Question 1034413</A>: <I><SPAN STYLE=\"word-break: break-all;\"> solve. Round to the nearest tenth of necessary\r<BR>\n" );
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document.write( "Mr. Jansen can shingle a roof in 10hrs, and Mr. Doyle can do it in 8 hrs. Mr. Davies has never done the job alone; but last time he helped with a similar job, it took the three men 3 1/3 hrs working together. How long would it take Mr. Davies alone? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #649115 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=649115\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Add their rates of working to get <BR>\n" );
document.write( "their rate working together<BR>\n" );
document.write( "Mr. Jansen's rate:<BR>\n" );
document.write( "[ 1 roof ] / [ 10 hrs ]<BR>\n" );
document.write( "Mr. Doyle's rate:<BR>\n" );
document.write( "[ 1 roof ] / [ 8 hrs ]<BR>\n" );
document.write( "The 3 men working together:<BR>\n" );
document.write( "[ 1 roof ] / [ 3.5 hrs ]<BR>\n" );
document.write( "----------------------------<BR>\n" );
document.write( "Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+ ALIGN=MIDDLE  ALT=\"+t+\"   DISABLED_style= \"max-width:90%; height:auto;\" > time in hrs for Mr. Davies to <BR>\n" );
document.write( "shingle the roof working alone<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1%2F10+%2B+1%2F8+%2B+1%2Ft+=+1%2F3.5+ ALIGN=MIDDLE  ALT=\"+1%2F10+%2B+1%2F8+%2B+1%2Ft+=+1%2F3.5+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1%2F10+%2B+1%2F8+%2B+1%2Ft+=+2%2F7+ ALIGN=MIDDLE  ALT=\"+1%2F10+%2B+1%2F8+%2B+1%2Ft+=+2%2F7+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Multiply both sides by <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+7%2A8%2A10t+ ALIGN=MIDDLE  ALT=\"+7%2A8%2A10t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+56t+%2B+70t+%2B+560+=+2%2A80t+ ALIGN=MIDDLE  ALT=\"+56t+%2B+70t+%2B+560+=+2%2A80t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+126t+%2B+560+=+160t+ ALIGN=MIDDLE  ALT=\"+126t+%2B+560+=+160t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+34t+=+560+ ALIGN=MIDDLE  ALT=\"+34t+=+560+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+16.4706+ ALIGN=MIDDLE  ALT=\"+t+=+16.4706+\"   DISABLED_style= \"max-width:90%; height:auto;\" > hrs<BR>\n" );
document.write( "and<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+.4706%2A60+=+28.2353+ ALIGN=MIDDLE  ALT=\"+.4706%2A60+=+28.2353+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "-------------------------<BR>\n" );
document.write( "Working alone, Mr Davies takes 16 hrs 28 min<BR>\n" );
document.write( "-------------------------<BR>\n" );
document.write( "check:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1%2F10+%2B+1%2F8+%2B+1%2F16.4706+=+1%2F3.5+ ALIGN=MIDDLE  ALT=\"+1%2F10+%2B+1%2F8+%2B+1%2F16.4706+=+1%2F3.5+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+.1+%2B+.125+%2B++.06071+=+.28571+ ALIGN=MIDDLE  ALT=\"+.1+%2B+.125+%2B++.06071+=+.28571+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+.225+%2B+.06071+=+.28571+ ALIGN=MIDDLE  ALT=\"+.225+%2B+.06071+=+.28571+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+.28571+=+.28571+ ALIGN=MIDDLE  ALT=\"+.28571+=+.28571+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "OK </SPAN>\n" );
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