document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=195696>Question 195696</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/9780136007333/algebrahomeworkh></A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> A B747 aircraft flew 6 hours with the wind. The return trip took 7 hours against the wind. If the speed of the plane in still air is 13 times the speed of the wind, find the wind speed and 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 #146752 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=146752\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A B747 aircraft flew 6 hours with the wind. The return trip took 7 hours<BR>\n" );
document.write( " against the wind. If the speed of the plane in still air is 13 times the<BR>\n" );
document.write( " speed of the wind, find the wind speed and the speed of the plane in still air.<BR>\n" );
document.write( ":<BR>\n" );
document.write( "Let x = speed of the wind<BR>\n" );
document.write( "then<BR>\n" );
document.write( "13x = speed of the plane in still air<BR>\n" );
document.write( "then<BR>\n" );
document.write( "12x = speed against the wind<BR>\n" );
document.write( "and<BR>\n" );
document.write( "14x = speed with the wind<BR>\n" );
document.write( ":<BR>\n" );
document.write( "Distance of the trips are equal so write a dist equation: dist = time * speed<BR>\n" );
document.write( ":<BR>\n" );
document.write( "7(12x) = 6(14x)<BR>\n" );
document.write( "84x = 84x like you would expect, just pick a speed for wind<BR>\n" );
document.write( "Say 40 mph<BR>\n" );
document.write( "then<BR>\n" );
document.write( "13*40 = 520 mph is the plane in still air, sounds reasonable, other speeds will work too <BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );