document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1084487>Question 1084487</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a boeing 747 flew from san Francisco to Honolulu, a distance of 2900 miles. Flying with the wind, it averaged 600 miles per hour. When the wind changed from tailwind to headwind, the planes speed dropped to 550 miles per hour. If the total time of the trip was 5 hours, determine the length of the time it flew at each speed </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #698581 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=698581\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> speed in calm air=x<BR>\n" );
document.write( "wind speed=w<BR>\n" );
document.write( "x+w=600<BR>\n" );
document.write( "x-w=550<BR>\n" );
document.write( "2x=1150<BR>\n" );
document.write( "x=575 mph<BR>\n" );
document.write( "t= time with tail wind<BR>\n" );
document.write( "5-t= time with head wind<BR>\n" );
document.write( "t(600)+(5-t)550=2900<BR>\n" );
document.write( "600t+2750-550t=2900<BR>\n" );
document.write( "50t=150<BR>\n" );
document.write( "t=3 hours at 600 mph (1800 miles)<BR>\n" );
document.write( "t=2 hours at 550 mph (1100 miles)<BR>\n" );
document.write( "They add to 2900 miles. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );