document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=765294>Question 765294</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a motorist drove his car 200mi. If his speed has been 5 mph faster he could have saved 2hrs travel time, what was his speed? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #466073 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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=466073\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a motorist drove his car 200mi. If his speed has been 5 mph faster he could have saved 2hrs travel time, what was his speed?<BR>\n" );
document.write( "***<BR>\n" );
document.write( "let x=<BR>\n" );
document.write( "x+5=\"if\" speed<BR>\n" );
document.write( "travel time=distance/speed<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=200%2Fx-200%2F%28x%2B5%29=2 ALIGN=MIDDLE  ALT=\"200%2Fx-200%2F%28x%2B5%29=2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "LCD:x(x+5)<BR>\n" );
document.write( "200(x+5)-200x=2x^2+10x<BR>\n" );
document.write( "200x+1000-200x=2x^2+10x<BR>\n" );
document.write( "2x^2+10x-1000=0<BR>\n" );
document.write( "x^2+5x-500=0<BR>\n" );
document.write( "(x-20)(x+25)=0<BR>\n" );
document.write( "x=-25 (reject, x>0)<BR>\n" );
document.write( "or<BR>\n" );
document.write( "x=20<BR>\n" );
document.write( "original speed= 20 mph\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );