document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=246104>Question 246104</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A plane flew for 576 miles directly into a strong wind and then flew back with the same wind.  If the total flying time was 5 hours, and the plane's airspeed was 250 mph, what was 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 #179746 by </B><A HREF=/tutors/aboutme.mpl?userid=rapaljer><B>rapaljer(4671)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rapaljer><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=rapaljer><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=179746\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let x = air speed\r<BR>\n" );
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document.write( "250+x = speed with the wind<BR>\n" );
document.write( "250-x= speed against the wind\r<BR>\n" );
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document.write( "Distance with the wind = Distance against the wind=576<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=R%2AT%5Bwith%5D=576 ALIGN=MIDDLE  ALT=\"R%2AT%5Bwith%5D=576\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=T%5Bwith%5D=576%2F%28250%2Bx%29 ALIGN=MIDDLE  ALT=\"T%5Bwith%5D=576%2F%28250%2Bx%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=R%2AT%5Bagainst%5D=576 ALIGN=MIDDLE  ALT=\"R%2AT%5Bagainst%5D=576\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=T%5Bagainst%5D=576%2F%28250-x%29 ALIGN=MIDDLE  ALT=\"T%5Bagainst%5D=576%2F%28250-x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "TOTAL TIME = 5<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=576%2F%28250%2Bx%29%2B576%2F%28250-x%29=5 ALIGN=MIDDLE  ALT=\"576%2F%28250%2Bx%29%2B576%2F%28250-x%29=5\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Multiply both sides by (250-x)(250+x):\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=576%28250-x%29%2B576%28250%2Bx%29=5%28250-x%29%28250%2Bx%29 ALIGN=MIDDLE  ALT=\"576%28250-x%29%2B576%28250%2Bx%29=5%28250-x%29%28250%2Bx%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=576%2A250-576x%2B576%2A250%2B576x=5%2862500-x%5E2%29 ALIGN=MIDDLE  ALT=\"576%2A250-576x%2B576%2A250%2B576x=5%2862500-x%5E2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "(I'm on vacation, and I don't have my calculator.  Use it if you have one!!)\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%2A576%2A250=312500-5x%5E2 ALIGN=MIDDLE  ALT=\"2%2A576%2A250=312500-5x%5E2\"   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=576%2A500=312500-5x%5E2 ALIGN=MIDDLE  ALT=\"576%2A500=312500-5x%5E2\"   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=288000=312500-5x%5E2 ALIGN=MIDDLE  ALT=\"288000=312500-5x%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5x%5E2=312500-288000 ALIGN=MIDDLE  ALT=\"5x%5E2=312500-288000\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5x%5E2=24500 ALIGN=MIDDLE  ALT=\"5x%5E2=24500\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2+=4900 ALIGN=MIDDLE  ALT=\"x%5E2+=4900\"   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=x=+sqrt%284900%29 ALIGN=MIDDLE  ALT=\"x=+sqrt%284900%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, which I can do even WITHOUT a calculator!!!\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=+70+ ALIGN=MIDDLE  ALT=\"x=+70+\"   DISABLED_style= \"max-width:90%; height:auto;\" > mph--a pretty strong wind!!\r<BR>\n" );
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document.write( "Dr. Robert J. Rapalje, Retired<BR>\n" );
document.write( "Seminole State College of Florida<BR>\n" );
document.write( "Altamonte Springs Campus\r<BR>\n" );
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document.write( " </SPAN>\n" );
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