document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=113477>Question 113477</A>: <I><SPAN STYLE=\"word-break: break-all;\"> can you help me?\r<BR>\n" );
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document.write( "1.an older computer unit requires 12min more to print a company's payroll than does a newer computer unit. used together the computers can print the payroll in 8 min. find the time the new computer unit, used alone, will require to print the payroll.\r<BR>\n" );
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document.write( "2.working together. Dan and Leah can mow a lawn in 1 h and 12 min. Working alone, Leah can mow the lawn in 1 h less time than it would take Dan. Find the time it takes for each of them, working on his/her own, to mow the lawn.\r<BR>\n" );
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document.write( "i hope you can help me..<BR>\n" );
document.write( "god bless.. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #82581 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><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=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=82581\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> when people (or machines) combine to do a task; each does some fraction of the task based on their individual speed\r<BR>\n" );
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document.write( "(combined speed)/(individual speed)=individual fraction of task\r<BR>\n" );
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document.write( "1. let x=\"new time\" ___ (8/12)+(8/x)=1 ___ multiplying by 12x gives 8x+96=12x\r<BR>\n" );
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document.write( "2. working in minutes ___ let x=Leah, so x+60=Dan ___ (72/x)+(72/(x+60))=1<BR>\n" );
document.write( "___ multiplying by (x)(x+60) gives 72(x+60)+72(x)=(x)(x+60) ___ 144x+4320=x^2+60x<BR>\n" );
document.write( "___ 0=x^2-84x-4320 ___ 0=(x-120)(x+36) </SPAN>\n" );
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