document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=346237>Question 346237</A>: <I><SPAN STYLE=\"word-break: break-all;\"> On a 2 mile racetrack you bike the first mile at 10 mph. At what rate must you bike the second mile in order to average 20mph for the entire track?\r<BR>\n" );
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document.write( "I am not sure what formula to use and the average has me confused. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #247580 by </B><A HREF=/tutors/aboutme.mpl?userid=Fombitz><B>Fombitz(32388)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Fombitz><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=Fombitz><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=247580\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Rate*Time=Distance<BR>\n" );
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document.write( "Average speed equals total distance divided by total time.<BR>\n" );
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document.write( "For the first mile,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10%2At%5B1%5D=1 ALIGN=MIDDLE  ALT=\"10%2At%5B1%5D=1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t%5B1%5D=1%2F10 ALIGN=MIDDLE  ALT=\"t%5B1%5D=1%2F10\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "For the second mile,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=R%2At%5B2%5D=1 ALIGN=MIDDLE  ALT=\"R%2At%5B2%5D=1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t%5B2%5D=1%2FR ALIGN=MIDDLE  ALT=\"t%5B2%5D=1%2FR\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "The total distance is 2 miles.<BR>\n" );
document.write( "The total time is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t%5B1%5D%2Bt%5B2%5D=1%2F10%2B1%2FR ALIGN=MIDDLE  ALT=\"t%5B1%5D%2Bt%5B2%5D=1%2F10%2B1%2FR\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%2F%281%2F10%2B1%2FR%29=20 ALIGN=MIDDLE  ALT=\"2%2F%281%2F10%2B1%2FR%29=20\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2=20%281%2F10%2B1%2FR%29 ALIGN=MIDDLE  ALT=\"2=20%281%2F10%2B1%2FR%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2=20%2F10%2B1%2FR ALIGN=MIDDLE  ALT=\"2=20%2F10%2B1%2FR\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2=2%2B1%2FR ALIGN=MIDDLE  ALT=\"2=2%2B1%2FR\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2FR=0 ALIGN=MIDDLE  ALT=\"1%2FR=0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "There is no solution.<BR>\n" );
document.write( "You cannot go fast enough to average 20 mph.<BR>\n" );
document.write( "20 mph for a 2 mile track requires 1/10 hr. <BR>\n" );
document.write( "You already used that 1/10 hr for your first lap.<BR>\n" );
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