document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=193777>Question 193777</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Steve traveled 150 miles at a certain speed. Had he gone 20mph faster, the trip would have taken 2 hours less. Find the speed of his vehicle. \r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #145505 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=145505\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  Steve traveled 150 miles at a certain speed. Had he gone 20mph faster, the trip would have taken 2 hours less. Find the speed of his vehicle. <BR>\n" );
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document.write( "d = rt<BR>\n" );
document.write( "150 = rt<BR>\n" );
document.write( "150 = (r+20)*(t-2)<BR>\n" );
document.write( "rt = (r+20)*(t-2)<BR>\n" );
document.write( "rt = rt -2r + 20t - 40<BR>\n" );
document.write( "2r - 20t + 40 = 0<BR>\n" );
document.write( "r - 10t + 20 = 0<BR>\n" );
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document.write( "t = 150/r<BR>\n" );
document.write( "r - 1500/r + 20 = 0<BR>\n" );
document.write( "r^2 + 20r - 1500 = 0<BR>\n" );
document.write( "(r+50)*(r-30) = 0<BR>\n" );
document.write( "r = 30 mph (Ignore the negative answer)<BR>\n" );
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