document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=892418>Question 892418</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Working alone Mandy can complete a project in 7 hours. It would take Colin 3 hours to complete the same project. If they work together, how long will it take them to complete the project? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #540537 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=540537\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Ad their rates of working<BR>\n" );
document.write( "Mandy's rate:<BR>\n" );
document.write( "( 1 project ) / ( 7 hrs )<BR>\n" );
document.write( "Colin's rate:<BR>\n" );
document.write( "( 1 project ) / ( 3 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 to finish project<BR>\n" );
document.write( "if they work together<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1%2F7+%2B+1%2F3+=+1%2Ft+ ALIGN=MIDDLE  ALT=\"+1%2F7+%2B+1%2F3+=+1%2Ft+\"   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=+21t+ ALIGN=MIDDLE  ALT=\"+21t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+3t+%2B+7t+=+21+ ALIGN=MIDDLE  ALT=\"+3t+%2B+7t+=+21+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+10t+=+21+ ALIGN=MIDDLE  ALT=\"+10t+=+21+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+2.1+ ALIGN=MIDDLE  ALT=\"+t+=+2.1+\"   DISABLED_style= \"max-width:90%; height:auto;\" > hrs<BR>\n" );
document.write( "Convert <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+.1+ ALIGN=MIDDLE  ALT=\"+.1+\"   DISABLED_style= \"max-width:90%; height:auto;\" > hrs to min<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+.1%2A60+=+6+ ALIGN=MIDDLE  ALT=\"+.1%2A60+=+6+\"   DISABLED_style= \"max-width:90%; height:auto;\" > min<BR>\n" );
document.write( "------------------<BR>\n" );
document.write( "Working together, it will take<BR>\n" );
document.write( "them 2 hrs and 6 min\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );