document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1094426>Question 1094426</A>: <I><SPAN STYLE=\"word-break: break-all;\"> An airplane encountered a head wind during a flight between Joppetown and Jawsburgh which took 4 hours and 36 minutes.  The return flight took 4 hours.  If the distance from Joppetown to Jawsburgh is 1400 &#8203;miles, find the airspeed of the plane&#8203; (the speed of the plane in still&#8203; air) and the speed of the&#8203; wind, assuming both remain constant. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #708977 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=708977\">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=+s+ ALIGN=MIDDLE  ALT=\"+s+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = the speed of the plane in still air<BR>\n" );
document.write( "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<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+36%2F60+=+.6+ ALIGN=MIDDLE  ALT=\"+36%2F60+=+.6+\"   DISABLED_style= \"max-width:90%; height:auto;\" > ( minutes to hrs )<BR>\n" );
document.write( "----------------------------------<BR>\n" );
document.write( "Flying against the wind:<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1400+=+%28+s+-+w+%29%2A4.6+ ALIGN=MIDDLE  ALT=\"+1400+=+%28+s+-+w+%29%2A4.6+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Flying with the wind:<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1400+=+%28+s+%2B+w+%29%2A4+ ALIGN=MIDDLE  ALT=\"+1400+=+%28+s+%2B+w+%29%2A4+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "---------------------------<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1400+=+4s+%2B+4w+ ALIGN=MIDDLE  ALT=\"+1400+=+4s+%2B+4w+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+4s+=+1400+-+4w+ ALIGN=MIDDLE  ALT=\"+4s+=+1400+-+4w+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+=+350+-+w+ ALIGN=MIDDLE  ALT=\"+s+=+350+-+w+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "---------------------------<BR>\n" );
document.write( "Plug (2) into (1)<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1400+=+%28+350+-+w+-+w+%29%2A4.6+ ALIGN=MIDDLE  ALT=\"+1400+=+%28+350+-+w+-+w+%29%2A4.6+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1400+=+%28+350+-+2w+%29%2A4.6+ ALIGN=MIDDLE  ALT=\"+1400+=+%28+350+-+2w+%29%2A4.6+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1400+=+1610+-+9.2w+ ALIGN=MIDDLE  ALT=\"+1400+=+1610+-+9.2w+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+9.2w+=+1610+-+1400+ ALIGN=MIDDLE  ALT=\"+9.2w+=+1610+-+1400+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+9.2w+=+210+ ALIGN=MIDDLE  ALT=\"+9.2w+=+210+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+w+=+22.826+ ALIGN=MIDDLE  ALT=\"+w+=+22.826+\"   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=+s+=+350+-+22.826+ ALIGN=MIDDLE  ALT=\"+s+=+350+-+22.826+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+=+327.174+ ALIGN=MIDDLE  ALT=\"+s+=+327.174+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "---------------------------<BR>\n" );
document.write( "The speed of the plane in still air is 327.174 mi/hr<BR>\n" );
document.write( "The wind speed is 22.826 mi/hr<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=+1400+=+%28+s-w+%29%2A4.6+ ALIGN=MIDDLE  ALT=\"+1400+=+%28+s-w+%29%2A4.6+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1400+=+%28+327.174+-+22.826+%29%2A4.6+ ALIGN=MIDDLE  ALT=\"+1400+=+%28+327.174+-+22.826+%29%2A4.6+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1400+=+304.348%2A4.6+ ALIGN=MIDDLE  ALT=\"+1400+=+304.348%2A4.6+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1400+=+1400.0008+ ALIGN=MIDDLE  ALT=\"+1400+=+1400.0008+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "close enough<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1400+=+%28+s%2Bw+%29%2A4+ ALIGN=MIDDLE  ALT=\"+1400+=+%28+s%2Bw+%29%2A4+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1400+=+%28+327.174+%2B+22.826+%29%2A4+ ALIGN=MIDDLE  ALT=\"+1400+=+%28+327.174+%2B+22.826+%29%2A4+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1400+=+350%2A4+ ALIGN=MIDDLE  ALT=\"+1400+=+350%2A4+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1400+=+1400+ ALIGN=MIDDLE  ALT=\"+1400+=+1400+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "OK<BR>\n" );
document.write( "Get a 2nd opinion if needed\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );