document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=992308>Question 992308</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Tammy and Cheryl are building a bridge over a small river. Tammy can do the job alone in 24 hours. Cheryl can do the job alone in 28 hours. Tammy worked on the project alone 4 hours before Cheryl joined her. The two then finished the job together. How long did it take the two to finish the job that Tammy had started alone. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #611936 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=611936\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> What fraction of the job did Tammy get<BR>\n" );
document.write( "done in 4 hrs?<BR>\n" );
document.write( "[ fraction of job ] = [ her rate of working ] x [ hrs worked ]<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28+1%2F24+%29%2A4+=+1%2F6+ ALIGN=MIDDLE  ALT=\"+%28+1%2F24+%29%2A4+=+1%2F6+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "That means there is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+5%2F6+ ALIGN=MIDDLE  ALT=\"+5%2F6+\"   DISABLED_style= \"max-width:90%; height:auto;\" > of the job left to do<BR>\n" );
document.write( "when Cheryl joined her<BR>\n" );
document.write( "------------------------<BR>\n" );
document.write( "Add their rates of working to get their<BR>\n" );
document.write( "rate working together<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 ime hrs for the both of them<BR>\n" );
document.write( "to do <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+5%2F6+ ALIGN=MIDDLE  ALT=\"+5%2F6+\"   DISABLED_style= \"max-width:90%; height:auto;\" > of the job<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1%2F24+%2B+1%2F28+=+%28%28+5%2F6+%29%29%2Ft+ ALIGN=MIDDLE  ALT=\"+1%2F24+%2B+1%2F28+=+%28%28+5%2F6+%29%29%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=+2+ ALIGN=MIDDLE  ALT=\"+2+\"   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+1%2F14+=+%28%28+5%2F3+%29%29%2Ft+ ALIGN=MIDDLE  ALT=\"+1%2F12+%2B+1%2F14+=+%28%28+5%2F3+%29%29%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=+84t+ ALIGN=MIDDLE  ALT=\"+84t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+7t+%2B+6t+=+140+ ALIGN=MIDDLE  ALT=\"+7t+%2B+6t+=+140+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+13t+=+140+ ALIGN=MIDDLE  ALT=\"+13t+=+140+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=10.77+ ALIGN=MIDDLE  ALT=\"+t+=10.77+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "It takes them 10.77 hrs to finish the job working together<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%2F24+%2B+1%2F28+=+%28%28+5%2F6+%29%29%2Ft+ ALIGN=MIDDLE  ALT=\"+1%2F24+%2B+1%2F28+=+%28%28+5%2F6+%29%29%2Ft+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1%2F24+%2B+1%2F28+=+%28%28+5%2F6+%29%29%2F10.77+ ALIGN=MIDDLE  ALT=\"+1%2F24+%2B+1%2F28+=+%28%28+5%2F6+%29%29%2F10.77+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1%2F24+%2B+1%2F28+=+5%2F64%2C62+ ALIGN=MIDDLE  ALT=\"+1%2F24+%2B+1%2F28+=+5%2F64%2C62+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+.041667+%2B+.035714+=+.077375+ ALIGN=MIDDLE  ALT=\"+.041667+%2B+.035714+=+.077375+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+.077381+=+.077375+ ALIGN=MIDDLE  ALT=\"+.077381+=+.077375+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "error due to rounding off, I think<BR>\n" );
document.write( "Recheck my math </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );