document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=993248>Question 993248</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A boy can row a boat a constant rate of 5 mi/hr in still water. He rows upstream 28 minutes and then travels downstream returning to his starting point in another 12 minutes. upstream net speed equals 5 - x miles per hourand downstream net speed equals 5 plus x miles per hourfind the right of the current in miles per hour find the total distance traveled in miles </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #612557 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=612557\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+28+ ALIGN=MIDDLE  ALT=\"+28+\"   DISABLED_style= \"max-width:90%; height:auto;\" >  min<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+28%2F60+=+7%2F15+ ALIGN=MIDDLE  ALT=\"+28%2F60+=+7%2F15+\"   DISABLED_style= \"max-width:90%; height:auto;\" > hr<BR>\n" );
document.write( "and<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+12+ ALIGN=MIDDLE  ALT=\"+12+\"   DISABLED_style= \"max-width:90%; height:auto;\" > min<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+12%2F60+=+1%2F5+ ALIGN=MIDDLE  ALT=\"+12%2F60+=+1%2F5+\"   DISABLED_style= \"max-width:90%; height:auto;\" > hr<BR>\n" );
document.write( "------------------<BR>\n" );
document.write( "Equation for rowing upstream:<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+%28+5+-+x+%29%2A%28+7%2F15+%29+ ALIGN=MIDDLE  ALT=\"+d+=+%28+5+-+x+%29%2A%28+7%2F15+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Equation for rowing downstream:<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+%28+5+%2B+x+%29%2A%28+1%2F5+%29+ ALIGN=MIDDLE  ALT=\"+d+=+%28+5+%2B+x+%29%2A%28+1%2F5+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "---------------------------<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+7%2F3+-+%28+7%2F15+%29%2Ax+ ALIGN=MIDDLE  ALT=\"+d+=+7%2F3+-+%28+7%2F15+%29%2Ax+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "and<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+1+%2B+%28+1%2F5+%29%2Ax+ ALIGN=MIDDLE  ALT=\"+d+=+1+%2B+%28+1%2F5+%29%2Ax+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "------------------------<BR>\n" );
document.write( "Substitute (1) into (2)<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+7%2F3+-+%28+7%2F15+%29%2Ax+=+1+%2B+%28+1%2F5+%29%2Ax+ ALIGN=MIDDLE  ALT=\"+7%2F3+-+%28+7%2F15+%29%2Ax+=+1+%2B+%28+1%2F5+%29%2Ax+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Multiply both sides by <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+15+ ALIGN=MIDDLE  ALT=\"+15+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+35+-+7x+=+15+%2B+3x+ ALIGN=MIDDLE  ALT=\"+35+-+7x+=+15+%2B+3x+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+10x+=+20+ ALIGN=MIDDLE  ALT=\"+10x+=+20+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+x+=+2+ ALIGN=MIDDLE  ALT=\"+x+=+2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "----------------<BR>\n" );
document.write( "The speed of the current is 2 mi/hr<BR>\n" );
document.write( "----------------<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+1+%2B+%28+1%2F5+%29%2Ax+ ALIGN=MIDDLE  ALT=\"+d+=+1+%2B+%28+1%2F5+%29%2Ax+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+1+%2B+%28+1%2F5+%29%2A2+ ALIGN=MIDDLE  ALT=\"+d+=+1+%2B+%28+1%2F5+%29%2A2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+1.4+ ALIGN=MIDDLE  ALT=\"+d+=+1.4+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "--------------<BR>\n" );
document.write( "The 2-way distance is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2%2A1.4+=+2.8+ ALIGN=MIDDLE  ALT=\"+2%2A1.4+=+2.8+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "2.8 mi total distance traveled<BR>\n" );
document.write( "-------------------------<BR>\n" );
document.write( "check:<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+%28+5+-+x+%29%2A%28+7%2F15+%29+ ALIGN=MIDDLE  ALT=\"+d+=+%28+5+-+x+%29%2A%28+7%2F15+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1.4+=+%28+5+-+2+%29%2A%28+7%2F15+%29+ ALIGN=MIDDLE  ALT=\"+1.4+=+%28+5+-+2+%29%2A%28+7%2F15+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1.4+=+7%2F5+ ALIGN=MIDDLE  ALT=\"+1.4+=+7%2F5+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1.4+=+1.4+ ALIGN=MIDDLE  ALT=\"+1.4+=+1.4+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "OK </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );