document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=735886>Question 735886</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Suppose Marco can stuff envelopes twice as fast as his friend Polo. Together, they can stuff 6750 envelopes in 4.5 hours. How long would it take each of them working alone? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #449588 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=449588\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Add their rates of working alone to get<BR>\n" );
document.write( "their rates working together<BR>\n" );
document.write( "For this problem call stuffing 6750 envelopes<BR>\n" );
document.write( "1 job.<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;\" > = Polo's time in hours to do 1 job<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2t+ ALIGN=MIDDLE  ALT=\"+2t+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = Marco's time in hrs to do 1 job<BR>\n" );
document.write( "------------------------------------<BR>\n" );
document.write( "( 1 job / t hrs ) + ( 1 job / 2t hrs ) = 1 job / 4.5 hrs<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1%2Ft+%2B+1%2F%282t%29+=+1%2F4.5+ ALIGN=MIDDLE  ALT=\"+1%2Ft+%2B+1%2F%282t%29+=+1%2F4.5+\"   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=+9t+ ALIGN=MIDDLE  ALT=\"+9t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+9+%2B+4.5+=+2t+ ALIGN=MIDDLE  ALT=\"+9+%2B+4.5+=+2t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2t+=+13.5+ ALIGN=MIDDLE  ALT=\"+2t+=+13.5+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+6.75+ ALIGN=MIDDLE  ALT=\"+t+=+6.75+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2t+=+13.5+ ALIGN=MIDDLE  ALT=\"+2t+=+13.5+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Marco does the job in 13.5 hrs<BR>\n" );
document.write( "Polo does the job in 6.75 hrs<BR>\n" );
document.write( "check:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1%2Ft+%2B+1%2F%282t%29+=+1%2F4.5+ ALIGN=MIDDLE  ALT=\"+1%2Ft+%2B+1%2F%282t%29+=+1%2F4.5+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1%2F6.75+%2B+1%2F13.5+=+1%2F4.5+ ALIGN=MIDDLE  ALT=\"+1%2F6.75+%2B+1%2F13.5+=+1%2F4.5+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+.148148+%2B+.074074+=+.222222+ ALIGN=MIDDLE  ALT=\"+.148148+%2B+.074074+=+.222222+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+.222222+=+.222222+ ALIGN=MIDDLE  ALT=\"+.222222+=+.222222+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "OK<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );