document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=839777>Question 839777</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A car traveled 468 mi at a certain speed. If the speed had been 13 mph faster, the trip could have been made in 3 hr less time. Find the speed.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #505825 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=505825\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A car traveled 468 mi at a certain speed. If the speed had been 13 mph faster, the trip could have been made in 3 hr less time. Find the speed. <BR>\n" );
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document.write( "Slower DATA:<BR>\n" );
document.write( "distance = 469 miles ; rate = r mph ; time = 469/r hrs<BR>\n" );
document.write( "------<BR>\n" );
document.write( "Faster DATA:<BR>\n" );
document.write( "distance = 469 miles ; rate = r+13 mph ; time = 469/(r+13) hrs<BR>\n" );
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document.write( "Equation:<BR>\n" );
document.write( "slower time - faster time = 3 hrs.<BR>\n" );
document.write( "469/r - 469/(r+13) = 3 hrs<BR>\n" );
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document.write( "469r + 469*13 - 469r = 3r(r+13)<BR>\n" );
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document.write( "3r^2 + 39r -469*13 = 0<BR>\n" );
document.write( "r = 39.05.. mph<BR>\n" );
document.write( "====================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "-------------------- </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );