document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1034843>Question 1034843</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Jeff & Kirk can build a 75- ft retaining wall together in 9 hours. Because Jeff has more experience be can build the wall by himself 2 hours quicker than Kirk. How long would it take Kirk to the nearest minute to build the wall by himself? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #649502 by </B><A HREF=/tutors/aboutme.mpl?userid=fractalier><B>fractalier(6550)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=fractalier><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=fractalier><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=649502\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Call the time Kirk takes alone, t hours.<BR>\n" );
document.write( "Thus Jeff can do it in t-2 hours.<BR>\n" );
document.write( "The setup looks like this<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=9%2Ft+%2B+9%2F%28t-2%29+=+1 ALIGN=MIDDLE  ALT=\"9%2Ft+%2B+9%2F%28t-2%29+=+1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Multiply by t(t-2) and get<BR>\n" );
document.write( "9(t-2) + 9t = t(t-2)<BR>\n" );
document.write( "Now solve for t...<BR>\n" );
document.write( "9t - 18 + 9t = t^2 - 2t<BR>\n" );
document.write( "t^2 - 20t + 18 = 0<BR>\n" );
document.write( "t = 19.0554 hours = 19 hours 3 minutes </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );