document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=541710>Question 541710</A>: <I><SPAN STYLE=\"word-break: break-all;\"> There are 630 dishes that need to be rinsed. John can rinse them in 70 min by himself it will take his friend Bob 105 min to rinse these dishes. How long will it take them if they rinse these 630 dishes together? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #354293 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=354293\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> There are 630 dishes that need to be rinsed.<BR>\n" );
document.write( " John can rinse them in 70 min by himself it will take his friend Bob 105 min to rinse these dishes.<BR>\n" );
document.write( " How long will it take them if they rinse these 630 dishes together?<BR>\n" );
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document.write( "Do it as a \"shared work\" equation<BR>\n" );
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document.write( "Let t = time required when they work together<BR>\n" );
document.write( "Let the completed job = 1 (the rinsing of 630 dishes)<BR>\n" );
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document.write( "Each will do a fraction of the job, the two fractions add up to 1<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t%2F70 ALIGN=MIDDLE  ALT=\"t%2F70\"   DISABLED_style= \"max-width:90%; height:auto;\" > + <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t%2F105 ALIGN=MIDDLE  ALT=\"t%2F105\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 1<BR>\n" );
document.write( "multiply by the LCM of 70 & 105 which is 210<BR>\n" );
document.write( "210*<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t%2F70 ALIGN=MIDDLE  ALT=\"t%2F70\"   DISABLED_style= \"max-width:90%; height:auto;\" > + 210*<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t%2F105 ALIGN=MIDDLE  ALT=\"t%2F105\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 210<BR>\n" );
document.write( "Cancel the denominators and you hav<BR>\n" );
document.write( "3t + 2t = 210<BR>\n" );
document.write( "5t = 210<BR>\n" );
document.write( "t = 42 min together<BR>\n" );
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document.write( "Check this<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=42%2F70 ALIGN=MIDDLE  ALT=\"42%2F70\"   DISABLED_style= \"max-width:90%; height:auto;\" > + <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=42%2F105 ALIGN=MIDDLE  ALT=\"42%2F105\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 1<BR>\n" );
document.write( ".6 + .4 = 1<BR>\n" );
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