document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=718025>Question 718025</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Question:<BR>\n" );
document.write( "If a plane can travel 500 miles per hour with the wind and 420 miles per hour against the wind, what is the speed of the plane in still air?<BR>\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 #440724 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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=440724\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If a plane can travel 500 miles per hour with the wind and 420 miles per hour against the wind, what is the speed of the plane in still air?<BR>\n" );
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document.write( "let x=speed of the plane in still air<BR>\n" );
document.write( "let c=speed of the wind<BR>\n" );
document.write( "..<BR>\n" );
document.write( "x+c=500<BR>\n" );
document.write( "x-c=420<BR>\n" );
document.write( "2x=920<BR>\n" );
document.write( "x=460<BR>\n" );
document.write( "c=500-x=40<BR>\n" );
document.write( "speed of the plane in still air=460 mph<BR>\n" );
document.write( "speed of the wind=40 mph </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );