document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1013391>Question 1013391</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If a plane can travel 490 miles per hour with the wind and 410 miles per hour against the wind, find the speed of the plane in still air.<BR>\n" );
document.write( "What is the speed of the plane in still air?<BR>\n" );
document.write( "___ miles per hour<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #629639 by </B><A HREF=/tutors/aboutme.mpl?userid=macston><B>macston(5194)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=macston><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=macston><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=629639\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .<BR>\n" );
document.write( "S=speed in still air; W=wind speed<BR>\n" );
document.write( ".<BR>\n" );
document.write( "S-W=410 mph<BR>\n" );
document.write( "S=W+410 mph<BR>\n" );
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document.write( "S+W=490<BR>\n" );
document.write( "(W+410mph)+W=490 mph<BR>\n" );
document.write( "2W+410mph=490mph<BR>\n" );
document.write( "2W=80mph<BR>\n" );
document.write( "W=40mph<BR>\n" );
document.write( "Wind speed is 40 mph.<BR>\n" );
document.write( ".<BR>\n" );
document.write( "S=W+410mph=40mph+410mph=450 mph<BR>\n" );
document.write( "ANSWER: Speed in still air is 450 mph.<BR>\n" );
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