document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=956727>Question 956727</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me with this math problem solving: Thank you, really appreciate it. Sorry guys, the first problem was incorrect, I missed another variables in it. But this is the question:\r<BR>\n" );
document.write( "\n" );
document.write( "oh sorry. this is the question:\r<BR>\n" );
document.write( "\n" );
document.write( "Dave and Sandy Hartranft are frequent flyers with Delta Airlines. They often fly from Philadelphia to Chicago, a distance of 780 miles. On one particular trip, they fly into the wind, and the flight takes 2 hours. The return trip, with the wind behind them, only takes 1 and 1/2 hours. If the wind speed is the same on each trip, find the speed of the wind and find the speed of the plane in still air.\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #584515 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=584515\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Back at you -looks OK now<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 windspeed 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 of the plane in still air in mi/hr<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+-+w+ ALIGN=MIDDLE  ALT=\"+s+-+w+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = the speed of the plane flying into the wind in mi/hr<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+%2B+w+ ALIGN=MIDDLE  ALT=\"+s+%2B+w+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = the speed of the plane flying with the wind in mi/hr<BR>\n" );
document.write( "--------------------------<BR>\n" );
document.write( "Flying into the wind:<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+780+=+%28+s+-+w+%29%2A2+ ALIGN=MIDDLE  ALT=\"+780+=+%28+s+-+w+%29%2A2+\"   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=+780+=+%28+s+%2B+w+%29%2A%283%2F2%29+ ALIGN=MIDDLE  ALT=\"+780+=+%28+s+%2B+w+%29%2A%283%2F2%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=+780+=+2s+-+2w+ ALIGN=MIDDLE  ALT=\"+780+=+2s+-+2w+\"   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=+1560+=+3s+%2B+3w+ ALIGN=MIDDLE  ALT=\"+1560+=+3s+%2B+3w+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "-----------------------<BR>\n" );
document.write( "Multiply both sides of ( 1 ) by <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+3%2F2+ ALIGN=MIDDLE  ALT=\"+3%2F2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "and add the equations<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1170+=+3s+-+3w+ ALIGN=MIDDLE  ALT=\"+1170+=+3s+-+3w+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1560+=+3s+%2B+3w+ ALIGN=MIDDLE  ALT=\"+1560+=+3s+%2B+3w+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "------------------------<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2730+=+6s+ ALIGN=MIDDLE  ALT=\"+2730+=+6s+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+=+455+ ALIGN=MIDDLE  ALT=\"+s+=+455+\"   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=+780+=+2%2A455+-+2w+ ALIGN=MIDDLE  ALT=\"+780+=+2%2A455+-+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=+2w+=+910+-+780+ ALIGN=MIDDLE  ALT=\"+2w+=+910+-+780+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2w+=+130+ ALIGN=MIDDLE  ALT=\"+2w+=+130+\"   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+=+65+ ALIGN=MIDDLE  ALT=\"+w+=+65+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "----------------<BR>\n" );
document.write( "The windspeed is 65 mi/hr<BR>\n" );
document.write( "The speed of the plane in still air is 455 mi/hr<BR>\n" );
document.write( "------------------------------------------<BR>\n" );
document.write( "check:<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+780+=+%28+s+%2B+w+%29%2A%283%2F2%29+ ALIGN=MIDDLE  ALT=\"+780+=+%28+s+%2B+w+%29%2A%283%2F2%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=+780+=+%28+455+%2B+65+%29%2A%283%2F2%29+ ALIGN=MIDDLE  ALT=\"+780+=+%28+455+%2B+65+%29%2A%283%2F2%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=+780+=+520%2A%283%2F2%29+ ALIGN=MIDDLE  ALT=\"+780+=+520%2A%283%2F2%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=+1560+=+1560+ ALIGN=MIDDLE  ALT=\"+1560+=+1560+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "OK<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+780+=+%28+s+-+w+%29%2A2+ ALIGN=MIDDLE  ALT=\"+780+=+%28+s+-+w+%29%2A2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+780+=+%28+455+-+65+%29%2A2+ ALIGN=MIDDLE  ALT=\"+780+=+%28+455+-+65+%29%2A2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+780+=+390%2A2+ ALIGN=MIDDLE  ALT=\"+780+=+390%2A2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+780+=+780+ ALIGN=MIDDLE  ALT=\"+780+=+780+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "OK\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );