document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1040149>Question 1040149</A>: <I><SPAN STYLE=\"word-break: break-all;\"> if an airplane has a tail wind, the wind increases the speed of the plane by that amount. Similarly, a headwind decreases the speed of a plane by that amount. Suppose a plane which can fly at 250 mph in no wind flies 350 miles in head wind and 390 in a tail 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 #654951 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39618)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=654951\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> w, wind speed<BR>\n" );
document.write( "r, airplane speed without wind<BR>\n" );
document.write( "r=250\r<BR>\n" );
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document.write( "WHAT amounts of time for those 350 miles and 390 miles?<BR>\n" );
document.write( "t time for the tail wind travel<BR>\n" );
document.write( "x time for the headwind travel\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=system%28%28r%2Bw%29t=350%2C%28r-w%29x=390%29 ALIGN=MIDDLE  ALT=\"system%28%28r%2Bw%29t=350%2C%28r-w%29x=390%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=system%28%28250%2Bw%29t=350%2C%28250-w%29x=390%29 ALIGN=MIDDLE  ALT=\"system%28%28250%2Bw%29t=350%2C%28250-w%29x=390%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >------Not much more can be done.  Three unknown variables but only two equations. </SPAN>\n" );
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