document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=702780>Question 702780</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Mai is kayaking on a river that has a current of 2 miles per hour. If r represents her rate in calm water, then r+2 represents her rate with the current, and r-2 represents her rate against the current. Mai kayaks 2 miles downstream and then back to her starting point. Use the formula for time, t=d/r, where d is the distance, to write a simplified expression for the total time it takes Mai to complete the trip. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #433159 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=433159\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+ ALIGN=MIDDLE  ALT=\"+t+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = the total time for the trip<BR>\n" );
document.write( "<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;\" ><BR>\n" );
document.write( "given: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+2+ ALIGN=MIDDLE  ALT=\"+d+=+2+\"   DISABLED_style= \"max-width:90%; height:auto;\" > mi<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+2%2Fr+ ALIGN=MIDDLE  ALT=\"+t+=+2%2Fr+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "------------------<BR>\n" );
document.write( "The rate of the current is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2+ ALIGN=MIDDLE  ALT=\"+2+\"   DISABLED_style= \"max-width:90%; height:auto;\" > mi/hr<BR>\n" );
document.write( "Equation for going upstream:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t%5B1%5D+=+2%2F%28+r+-+2+%29+ ALIGN=MIDDLE  ALT=\"+t%5B1%5D+=+2%2F%28+r+-+2+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Equation for going downstream:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t%5B2%5D+=+2%2F%28+r+%2B+2+%29+ ALIGN=MIDDLE  ALT=\"+t%5B2%5D+=+2%2F%28+r+%2B+2+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+t%5B1%5D+%2B+t%5B2%5D+ ALIGN=MIDDLE  ALT=\"+t+=+t%5B1%5D+%2B+t%5B2%5D+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+2%2F%28+r-2+%29+%2B+2%2F%28+r%2B2+%29+ ALIGN=MIDDLE  ALT=\"+t+=+2%2F%28+r-2+%29+%2B+2%2F%28+r%2B2+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+2%2A%28+1%2F%28+r-2%29+%2B+1%2F%28+r%2B2+%29%29+ ALIGN=MIDDLE  ALT=\"+t+=+2%2A%28+1%2F%28+r-2%29+%2B+1%2F%28+r%2B2+%29%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );