document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=133407>Question 133407</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0201525267/algebrahomeworkh></A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> A car is driven 280 miles. If it had gone 5 mph faster, it could have made the trip in 1 hr less time. what was 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 #97680 by </B><A HREF=/tutors/aboutme.mpl?userid=vleith><B>vleith(2983)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=vleith><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=97680\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Distance = speed * time\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=280+=+S+%2A+t+ ALIGN=MIDDLE  ALT=\"280+=+S+%2A+t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+280%2FS+=+t+ ALIGN=MIDDLE  ALT=\"+280%2FS+=+t+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "If the car was drive 5 mph faster, it would have arrived 1 hour earlier. So <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=280+=+%28S%2B5%29+%2A+%28t-1%29 ALIGN=MIDDLE  ALT=\"280+=+%28S%2B5%29+%2A+%28t-1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=280+=+%28S%2B5%29+%2A+%28%28280%2FS%29+-1%29+ ALIGN=MIDDLE  ALT=\"280+=+%28S%2B5%29+%2A+%28%28280%2FS%29+-1%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+280+=+%28S%2B5%29+%2A+%28%28280+-S%29%2FS%29+ ALIGN=MIDDLE  ALT=\"+280+=+%28S%2B5%29+%2A+%28%28280+-S%29%2FS%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+280+=+%28280+-+S%29+%2B+%285%28280+-S%29%29%2FS+ ALIGN=MIDDLE  ALT=\"+280+=+%28280+-+S%29+%2B+%285%28280+-S%29%29%2FS+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+0+=+-S+%2B+%281400+-5S%29%2FS+ ALIGN=MIDDLE  ALT=\"+0+=+-S+%2B+%281400+-5S%29%2FS+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+0+=+-S%5E2+-5S+%2B+1400+ ALIGN=MIDDLE  ALT=\"+0+=+-S%5E2+-5S+%2B+1400+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+0+=+S%5E2+%2B+5S+-+1400+ ALIGN=MIDDLE  ALT=\"+0+=+S%5E2+%2B+5S+-+1400+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+0+=+%28S+%2B+40%29+%28S++-+35%29+ ALIGN=MIDDLE  ALT=\"+0+=+%28S+%2B+40%29+%28S++-+35%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "S = -40 or S = 35. Since S can't be negative, S must be 35.\r<BR>\n" );
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document.write( "Check your answer.<BR>\n" );
document.write( "280 / 35 = 8 hours<BR>\n" );
document.write( "289 / 40 = 7 hours. Check!\r<BR>\n" );
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