document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=885981>Question 885981</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Mary and Carol are doing a month project. Carol can do work twice as fast as Mary. If they work together they can finish the project in 4 hours. How long does it take to do the same project? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #535600 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=535600\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let Mary's rate of working = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+R%5Bm%5D+ ALIGN=MIDDLE  ALT=\"+R%5Bm%5D+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "in units of ( 1 project ) / ( time to do that project )<BR>\n" );
document.write( "Carol's rate  = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2R%5Bm%5D+ ALIGN=MIDDLE  ALT=\"+2R%5Bm%5D+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "-----------------------<BR>\n" );
document.write( "Add their rates of working to get their rate<BR>\n" );
document.write( "working together<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+R%5Bm%5D+%2B+2R%5Bm%5D+=+1%2F4+ ALIGN=MIDDLE  ALT=\"+R%5Bm%5D+%2B+2R%5Bm%5D+=+1%2F4+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "( the <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1%2F4+ ALIGN=MIDDLE  ALT=\"+1%2F4+\"   DISABLED_style= \"max-width:90%; height:auto;\" > is ( 1 project / 4 hrs ) )<BR>\n" );
document.write( "-----------------------------------<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+3R%5Bm%5D+=+1%2F4+ ALIGN=MIDDLE  ALT=\"+3R%5Bm%5D+=+1%2F4+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+R%5Bm%5D+=+1%2F12+ ALIGN=MIDDLE  ALT=\"+R%5Bm%5D+=+1%2F12+\"   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=+2R%5Bm%5D+=+2%2F12+ ALIGN=MIDDLE  ALT=\"+2R%5Bm%5D+=+2%2F12+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2R%5Bm%5D+=+1%2F6+ ALIGN=MIDDLE  ALT=\"+2R%5Bm%5D+=+1%2F6+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "-------------------<BR>\n" );
document.write( "Mary can do the project in 12 hrs<BR>\n" );
document.write( "Carol can do the project in 6 hrs<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%2F12+%2B+1%2F6+=+1%2F4+ ALIGN=MIDDLE  ALT=\"+1%2F12+%2B+1%2F6+=+1%2F4+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1%2F12+%2B+2%2F12+=+3%2F12+ ALIGN=MIDDLE  ALT=\"+1%2F12+%2B+2%2F12+=+3%2F12+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+3%2F12+=+3%2F12+ ALIGN=MIDDLE  ALT=\"+3%2F12+=+3%2F12+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "OK<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );