document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=634002>Question 634002</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a river has a current of 5mph. it takes al half an hour longer to paddle upstream 1.2 miles than to paddle downstream the same distance. what is Als rate in still water?\r<BR>\n" );
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document.write( "set up a quadratic equation and solve  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #399334 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=399334\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> river - 5 mph<BR>\n" );
document.write( "boat x\r<BR>\n" );
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document.write( "upstream speed = x-5<BR>\n" );
document.write( "downstream = x+5\r<BR>\n" );
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document.write( "1.2/(x-5)-1.2/(x+5)= 1/2\r<BR>\n" );
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document.write( "LCD = 2(x-5)(x+5)\r<BR>\n" );
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document.write( "multiply equation by LCD<BR>\n" );
document.write( "2*1.2(x+5) - 2*1.2(x-5) = 1/2 * 2*(x-5)(x+5)\r<BR>\n" );
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document.write( "2.4x+12-2.4x+12=x^2-25<BR>\n" );
document.write( "24+25=x^2\r<BR>\n" );
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document.write( "49=x^2\r<BR>\n" );
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document.write( "x +/- 7 \r<BR>\n" );
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document.write( "speed of boat = 7 mph </SPAN>\n" );
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