document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=133076>Question 133076</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Michael rows 8 mph in still water.  If he rows 24 miles downstream in the same amount of time he rows 8 miles upstream, find the rate of the current.\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #97292 by </B><A HREF=/tutors/aboutme.mpl?userid=solver91311><B>solver91311(24713)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=solver91311><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=solver91311><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=97292\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> rate of the current: r<BR>\n" );
document.write( "downstream rate of the boat: 8 + r<BR>\n" );
document.write( "upstream rate of the boat: 8 - r\r<BR>\n" );
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document.write( "distance = rate times time, or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d=rt ALIGN=MIDDLE  ALT=\"d=rt\"   DISABLED_style= \"max-width:90%; height:auto;\" >, so <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t=d%2Fr ALIGN=MIDDLE  ALT=\"t=d%2Fr\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
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document.write( "Downstream trip:  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t=24%2F%288%2Br%29 ALIGN=MIDDLE  ALT=\"t=24%2F%288%2Br%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Upstream trip: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t=8%2F%288-r%29 ALIGN=MIDDLE  ALT=\"t=8%2F%288-r%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Since the times for each trip are equal:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=8%2F%288-r%29=24%2F%288%2Br%29 ALIGN=MIDDLE  ALT=\"8%2F%288-r%29=24%2F%288%2Br%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Cross multiply:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=8%288%2Br%29=24%288-r%29 ALIGN=MIDDLE  ALT=\"8%288%2Br%29=24%288-r%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Distribute:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=64%2B8r=192-24r ALIGN=MIDDLE  ALT=\"64%2B8r=192-24r\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Collect like terms:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=8r%2B24r=192-64 ALIGN=MIDDLE  ALT=\"8r%2B24r=192-64\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=32r=128 ALIGN=MIDDLE  ALT=\"32r=128\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r=4 ALIGN=MIDDLE  ALT=\"r=4\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "So the rate of the current is 4.\r<BR>\n" );
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document.write( "Check:<BR>\n" );
document.write( "8mph + 4mph  = 12mph, 24m/12mph = 2 hr\r<BR>\n" );
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document.write( "8mph - 4mph = 4mph, 8m/4mph = 2 hr\r<BR>\n" );
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document.write( "Answer checks </SPAN>\n" );
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