document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=913530>Question 913530</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me with this problem:\r<BR>\n" );
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document.write( "A jogger is training for a marathon. She wants to run 20 miles in two hours. She runs the first 10 miles at 8 mph. How fast must she run the last 10 miles to achieve her goal? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #554570 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39630)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=554570\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> She wants to run 20 miles in 2 hours OR an average of 10 miles per hour.\r<BR>\n" );
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document.write( "RT=D<BR>\n" );
document.write( "Let r be the speed during the second ten miles.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=8%2At=10 ALIGN=MIDDLE  ALT=\"8%2At=10\"   DISABLED_style= \"max-width:90%; height:auto;\" > and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r%282-t%29=10 ALIGN=MIDDLE  ALT=\"r%282-t%29=10\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "First equation describes the first ten miles, and the second equation describes the last ten miles.  Solve for t in the first equation, and use it in the second equation, and then solve the second equation for r. </SPAN>\n" );
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