document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=910318>Question 910318</A>: <I><SPAN STYLE=\"word-break: break-all;\"> John can paint his room in 5 hours; Toby can paint the same room in 8 hours.  How long will it take if they work together? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #552397 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=552397\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Add their rates of working to get<BR>\n" );
document.write( "their rate working together<BR>\n" );
document.write( "-------------------------<BR>\n" );
document.write( "John's rate:<BR>\n" );
document.write( "( 1 room ) / ( 5 hrs )<BR>\n" );
document.write( "Toby's rate:<BR>\n" );
document.write( "( 1 room ) / ( 8 hrs )<BR>\n" );
document.write( "-----------------<BR>\n" );
document.write( "Let their rate working together <BR>\n" );
document.write( "= ( 1 room ) / ( t hrs )<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1%2F5+%2B+1%2F8+=+1%2Ft+ ALIGN=MIDDLE  ALT=\"+1%2F5+%2B+1%2F8+=+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=+40t+ ALIGN=MIDDLE  ALT=\"+40t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+8t+%2B+5t+=+40+ ALIGN=MIDDLE  ALT=\"+8t+%2B+5t+=+40+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+13t+=+40+ ALIGN=MIDDLE  ALT=\"+13t+=+40+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+3.077+ ALIGN=MIDDLE  ALT=\"+t+=+3.077+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "It will take them 3.077 hrs, or about<BR>\n" );
document.write( "3 hrs 5 min working together<BR>\n" );
document.write( "-------------------------<BR>\n" );
document.write( "check answer:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1%2F5+%2B+1%2F8+=+1%2F3.077+ ALIGN=MIDDLE  ALT=\"+1%2F5+%2B+1%2F8+=+1%2F3.077+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+.2+%2B+.125+=+.325+ ALIGN=MIDDLE  ALT=\"+.2+%2B+.125+=+.325+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+.325+=+.325+ ALIGN=MIDDLE  ALT=\"+.325+=+.325+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "OK </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );