document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=912746>Question 912746</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A car traveled a distance of 100 miles. If its average speed had been 8 mph more, the trip would have taken 25 minutes less. What was the car's average speed? Please show me the steps to solve this. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #554047 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=554047\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A car traveled a distance of 100 miles. \r<BR>\n" );
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document.write( "let speed be x mph\r<BR>\n" );
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document.write( "If its average speed had been 8 mph more,   (x+8) mph\r<BR>\n" );
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document.write( " the trip would have taken 25 minutes less. =25/60 = 5/12 hours\r<BR>\n" );
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document.write( "Time with original speed - time with increased speed = 5/12\r<BR>\n" );
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document.write( "t=d/r\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28100%2Fx%29+-+100%2F%28x%2B8%29+=+5%2F12 ALIGN=MIDDLE  ALT=\"%28100%2Fx%29+-+100%2F%28x%2B8%29+=+5%2F12\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "multiply equation by 12x(x+8)\r<BR>\n" );
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document.write( "12*100*(x+8) -12*100x = 5*x(x+8)\r<BR>\n" );
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document.write( "1200x+9600 -1200x = 5x^2+40x\r<BR>\n" );
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document.write( "5x^2+40x-9600=0\r<BR>\n" );
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document.write( "/5<BR>\n" );
document.write( "x^2+8x-1920=0\r<BR>\n" );
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document.write( "x^2+8x+16 = 1920+16\r<BR>\n" );
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document.write( "(x+4)^2= 1936\r<BR>\n" );
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document.write( "x+4 = +/-44\r<BR>\n" );
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document.write( "ignore negative\r<BR>\n" );
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document.write( "x= 40 mph\r<BR>\n" );
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document.write( " </SPAN>\n" );
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