document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=903884>Question 903884</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Imogene's car traveled 336 miles averaging a certain speed. If the car had gone 6 mph faster, the trip would have taken 1 hour less. Find the average speed.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #548479 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=548479\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  Imogene's car traveled 336 miles averaging a certain speed.<BR>\n" );
document.write( " If the car had gone 6 mph faster, the trip would have taken 1 hour less.<BR>\n" );
document.write( " Find the average speed.<BR>\n" );
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document.write( "let s = the average speed<BR>\n" );
document.write( "then<BR>\n" );
document.write( "(s+6) = the faster speed<BR>\n" );
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document.write( "Write a time equation; time = dist/speed<BR>\n" );
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document.write( "normal speed time - faster speed time = 1 hr<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=336%2Fs ALIGN=MIDDLE  ALT=\"336%2Fs\"   DISABLED_style= \"max-width:90%; height:auto;\" > - <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=336%2F%28%28s%2B6%29%29 ALIGN=MIDDLE  ALT=\"336%2F%28%28s%2B6%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 1<BR>\n" );
document.write( "multiply equation by s(s+6), cancel the denominators and you have<BR>\n" );
document.write( "336(s+6) - 336s = s(s+6)<BR>\n" );
document.write( "336s + 2016 - 336s = s^2 + 6s<BR>\n" );
document.write( "a quadratic equation<BR>\n" );
document.write( "0 = s^2 + 6s - 2016<BR>\n" );
document.write( "You can use the quadratic equation here, but this will factor to<BR>\n" );
document.write( "(s-42)(s+48) = 0<BR>\n" );
document.write( "the positive solution <BR>\n" );
document.write( "s = 42 mph is the normal speed<BR>\n" );
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document.write( "Confirm this, find the actual time of each scenario<BR>\n" );
document.write( "336/42 = 8 hrs<BR>\n" );
document.write( "336/48 = 7 hrs<BR>\n" );
document.write( "--------------<BR>\n" );
document.write( "difference 1 hr </SPAN>\n" );
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