document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=136412>Question 136412</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me solve this word problem:\r<BR>\n" );
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document.write( "Garrett and Chris have a summer job washing cars at a car dealership. Chris can get the cars washed 3 hours quicker than Garrett can. Together, they can wash the cars in 5 hours. How long would it take Chris to do it alone? (Round your answer to the nearest tenth of an hour).  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #99916 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=99916\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Chris can get the cars washed 3 hours quicker than Garrett can. Together, they can wash the cars in 5 hours. How long would it take Chris to do it alone? (Round your answer to the nearest tenth of an hour). <BR>\n" );
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document.write( "Chris DATA:<BR>\n" );
document.write( "Time = x hrs/job ; Rate = 1/x job/hrs<BR>\n" );
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document.write( "Garrett DATA:<BR>\n" );
document.write( "Time = (x+3) hrs/job ; Rate = 1/(x+3) job/hrs<BR>\n" );
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document.write( "Together DATA:<BR>\n" );
document.write( "Time = 5 hrs/job ; Rate = 1/5 job/hr<BR>\n" );
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document.write( "EQUATION:<BR>\n" );
document.write( "rate + rate = tothether rate<BR>\n" );
document.write( "1/x + 1/(x+3) = 1/5<BR>\n" );
document.write( "5(x+3) + 5x = x(x+3)<BR>\n" );
document.write( "10x+15 = x^2+3x<BR>\n" );
document.write( "x^2-7x-15 = 0<BR>\n" );
document.write( "x= [7 +- sqrt(49 -4*-15)]/2<BR>\n" );
document.write( "x = [7 +- sqrt(109)]/2<BR>\n" );
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document.write( "This answer is irrational so time canonly be approximated:<BR>\n" );
document.write( "x = 8.72.... hrs (Chris's time to do the job)<BR>\n" );
document.write( "x+3 = 11.72... hrs (Garrett's time 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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