document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=599626>Question 599626</A>: <I><SPAN STYLE=\"word-break: break-all;\"> An airplane can travel 425 mph in still air. If it travels 4131 miles with the wind in the same length of time it travels 3519 miles against the wind, what is the speed of the wind? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #379020 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=379020\">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=+w+ ALIGN=MIDDLE  ALT=\"+w+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = the wind speed in mi/hr<BR>\n" );
document.write( "Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+ ALIGN=MIDDLE  ALT=\"+s+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = the speed in mi/hr of the plane in still air<BR>\n" );
document.write( "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;\" > = time of flights  in hrs both with and against the wind<BR>\n" );
document.write( "-----------<BR>\n" );
document.write( "Flying with the wind:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+4131+=+%28+s+%2B+w+%29%2At+ ALIGN=MIDDLE  ALT=\"+4131+=+%28+s+%2B+w+%29%2At+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+4131+=+%28+425+%2B+w+%29%2At+ ALIGN=MIDDLE  ALT=\"+4131+=+%28+425+%2B+w+%29%2At+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Flying against the wind:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+3519+=+%28+s+-+w+%29%2At+ ALIGN=MIDDLE  ALT=\"+3519+=+%28+s+-+w+%29%2At+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+3519+=+%28+425+-+w+%29%2At+ ALIGN=MIDDLE  ALT=\"+3519+=+%28+425+-+w+%29%2At+\"   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=+t+=+4131+%2F+%28+425+%2B+w+%29+ ALIGN=MIDDLE  ALT=\"+t+=+4131+%2F+%28+425+%2B+w+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+3519+%2F+%28+425+-+w+%29+ ALIGN=MIDDLE  ALT=\"+t+=+3519+%2F+%28+425+-+w+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+4131+%2F+%28425+%2B+w+%29+=+3519+%2F+%28+425+-+w+%29+ ALIGN=MIDDLE  ALT=\"+4131+%2F+%28425+%2B+w+%29+=+3519+%2F+%28+425+-+w+%29+\"   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=+%28+425+%2B+w++%29%2A%28+425+-+w+%29+ ALIGN=MIDDLE  ALT=\"+%28+425+%2B+w++%29%2A%28+425+-+w+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+4131%2A%28+425+-+w+%29+=+3519%2A%28+425+%2B+w+%29+ ALIGN=MIDDLE  ALT=\"+4131%2A%28+425+-+w+%29+=+3519%2A%28+425+%2B+w+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1755675+-+4131w+=+1495575+%2B+3519w+ ALIGN=MIDDLE  ALT=\"+1755675+-+4131w+=+1495575+%2B+3519w+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+7650w+=+1755675+-+1495575+ ALIGN=MIDDLE  ALT=\"+7650w+=+1755675+-+1495575+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+7650w+=+260100+ ALIGN=MIDDLE  ALT=\"+7650w+=+260100+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+w+=+34+ ALIGN=MIDDLE  ALT=\"+w+=+34+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "The wind speed is 34 mi/hr<BR>\n" );
document.write( "check:<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+4131+=+%28+425+%2B+34+%29%2At+ ALIGN=MIDDLE  ALT=\"+4131+=+%28+425+%2B+34+%29%2At+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+4131+=+459t+ ALIGN=MIDDLE  ALT=\"+4131+=+459t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "{1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+9+ ALIGN=MIDDLE  ALT=\"+t+=+9+\"   DISABLED_style= \"max-width:90%; height:auto;\" > hrs<BR>\n" );
document.write( "and<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+3519+=+%28+425+-+34+%29%2At+ ALIGN=MIDDLE  ALT=\"+3519+=+%28+425+-+34+%29%2At+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+3519+=+391t+ ALIGN=MIDDLE  ALT=\"+3519+=+391t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+9+ ALIGN=MIDDLE  ALT=\"+t+=+9+\"   DISABLED_style= \"max-width:90%; height:auto;\" > hrs<BR>\n" );
document.write( "OK </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );