document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=232419>Question 232419</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Can someone please walk me through these?\r<BR>\n" );
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document.write( "a) It takes a groundskeeper 45 minutes to prepare a softball field for a game. It takes his assistant 50 minutes to prepare the same field. How long will it take if they work together to prepare the field?<BR>\n" );
document.write( "____ minutes \r<BR>\n" );
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document.write( "b) It takes the owner/operator of a dog kennel 7 hours to clean all of the cages. It takes his assistant 4 hour(s) more than that to clean the same cages. How long will it take if they work together?<BR>\n" );
document.write( "____ hours\r<BR>\n" );
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document.write( "Thank you,<BR>\n" );
document.write( "John </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #171763 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=171763\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a) It takes a groundskeeper 45 minutes to prepare a softball field for a game. It takes his assistant 50 minutes to prepare the same field. How long will it take if they work together to prepare the field?<BR>\n" );
document.write( "G does 1/45 job per minute<BR>\n" );
document.write( "A does 1/50 job per minute<BR>\n" );
document.write( "Together, they do 1/45 + 1/50 = 19/450 jobs/minute<BR>\n" );
document.write( "--> 450/19 minutes to do the job<BR>\n" );
document.write( "You can use a shortcut, product/sum<BR>\n" );
document.write( "50*45/(50+45) = 2250/95<BR>\n" );
document.write( "= 450/19<BR>\n" );
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document.write( "b) It takes the owner/operator of a dog kennel 7 hours to clean all of the cages. It takes his assistant 4 hour(s) more than that to clean the same cages. How long will it take if they work together?<BR>\n" );
document.write( "This is 7 and 11 hours.<BR>\n" );
document.write( "7*11/(7+11) = 77/18 hours<BR>\n" );
document.write( "= ~ 4.28 hours </SPAN>\n" );
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