document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=408764>Question 408764</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Liz drove the first half of a trip at 36 mi/h. At what speed should she cover the remaining half in order to average 45 mi/h for the whole trip </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #287890 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=287890\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Liz drove the first half of a trip at 36 mi/h. At what speed should she cover the remaining half in order to average 45 mi/h for the whole trip<BR>\n" );
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document.write( "1st half DATA:<BR>\n" );
document.write( "distance = x miles ; rate = 36 mph ; time = x/36 hrs.<BR>\n" );
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document.write( "Whole trip DATA:<BR>\n" );
document.write( "distance = 2x miles ; rate = 45 mph ; time = 2x/45 hrs<BR>\n" );
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document.write( "2nd half DATA:<BR>\n" );
document.write( "distance = x miles; <BR>\n" );
document.write( "time = (2x/45)-(x/36) = (72x-45x)/(45*36) <BR>\n" );
document.write( "= 27x/(45*36) = x/(5*12) = x/60 hrs<BR>\n" );
document.write( "rate = d/t = x/(x/60) = 60 mph<BR>\n" );
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document.write( "Ans: 60 mph<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "========== </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );