document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=693460>Question 693460</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A boat. Goes 350 miles down stream in the same time it can go 300 miles upstream. The speed of the current is 7 miles per hour. Find the speed of the boat in still water? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #427413 by </B><A HREF=/tutors/aboutme.mpl?userid=pmatei><B>pmatei(79)</B></A><img src=\"/images/stars/stars-08.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=pmatei><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=427413\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> To find time you need to divide the distance by the relative speed.\r<BR>\n" );
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document.write( "Going upstream the relative speed is the speed of the boat minus the speed of the current. Going downstream the relative speed is the sum of the speed of the boat and the speed of the current.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t=d%5Bup%5D%2F%28v%5Bboat%5D-v%5Bcurrent%5D%29 ALIGN=MIDDLE  ALT=\"t=d%5Bup%5D%2F%28v%5Bboat%5D-v%5Bcurrent%5D%29\"   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=t=d%5Bdown%5D%2F%28v%5Bboat%5D%2Bv%5Bcurrent%5D%29 ALIGN=MIDDLE  ALT=\"t=d%5Bdown%5D%2F%28v%5Bboat%5D%2Bv%5Bcurrent%5D%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Put them together:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5Bup%5D%2F%28v%5Bboat%5D-v%5Bcurrent%5D%29=d%5Bdown%5D%2F%28v%5Bboat%5D%2Bv%5Bcurrent%5D%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Replace with your numbers:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=300%2F%28v%5Bboat%5D-7%29=350%2F%28v%5Bboat%5D%2B7%29 ALIGN=MIDDLE  ALT=\"300%2F%28v%5Bboat%5D-7%29=350%2F%28v%5Bboat%5D%2B7%29\"   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=350%28v%5Bboat%5D-7%29=300%28v%5Bboat%5D%2B7%29 ALIGN=MIDDLE  ALT=\"350%28v%5Bboat%5D-7%29=300%28v%5Bboat%5D%2B7%29\"   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=350v%5Bboat%5D-2450=300v%5Bboat%5D%2B2100 ALIGN=MIDDLE  ALT=\"350v%5Bboat%5D-2450=300v%5Bboat%5D%2B2100\"   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=50v%5Bboat%5D=4550 ALIGN=MIDDLE  ALT=\"50v%5Bboat%5D=4550\"   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=v%5Bboat%5D=91mph ALIGN=MIDDLE  ALT=\"v%5Bboat%5D=91mph\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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