document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=517440>Question 517440</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If a plane can travel 460 miles per hour with the wind and 420 miles per hour agianst the wind, find the speed of the plane in still air. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #344772 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=344772\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If a plane can travel 460 miles per hour with the wind and 420 miles per hour against the wind, find the speed of the plane in still air.<BR>\n" );
document.write( "-------------------------------<BR>\n" );
document.write( "Down-wind DATA:<BR>\n" );
document.write( "p + w = 460<BR>\n" );
document.write( "p - w = 420<BR>\n" );
document.write( "-----------------<BR>\n" );
document.write( "Add and solve for \"p\":<BR>\n" );
document.write( "2p = 880<BR>\n" );
document.write( "plane speed = 440 mph<BR>\n" );
document.write( "--------<BR>\n" );
document.write( "Solve for \"w\":<BR>\n" );
document.write( "p + w = 460<BR>\n" );
document.write( "440 + w = 460<BR>\n" );
document.write( "w = 20 mph (wind speed)<BR>\n" );
document.write( "-------------------------<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "========================= </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );