document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=479297>Question 479297</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Andrew can do a piece of work in r days and bill. who works faster, can do the same work in S days. which of the following expressions, if any, represents the number of days the two of them would take to do the work if they worked together? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #328397 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=328397\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Andrew can do a piece of work in r days and bill. who works faster, can do the same work in S days. which of the following expressions, if any, represents the number of days the two of them would take to do the work if they worked together?<BR>\n" );
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document.write( "Andrew rate: 1/r job/day<BR>\n" );
document.write( "Bill rate::: 1/S job/day<BR>\n" );
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document.write( "Together rate: (1/r)+(1/S) = [(S + r)/(rS)] job/day<BR>\n" );
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document.write( "Together time: (rS)/(S+r) = days to do the job<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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