document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=347091>Question 347091</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A hawk can fly 300 miles in 8 hours with the wind.  Flying against the wind, the hawk covers only one-third of the distance in 7 hours.  What is the rate of the wind? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #248176 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=248176\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> speed of hawk in still air  = x<BR>\n" );
document.write( "speed of wind = y<BR>\n" );
document.write( "distance / speed = time<BR>\n" );
document.write( "300/(x+y)=8<BR>\n" );
document.write( "8x+8y=300<BR>\n" );
document.write( "...<BR>\n" );
document.write( "against wind<BR>\n" );
document.write( "100/(x-y)=7<BR>\n" );
document.write( "7x-7y=100<BR>\n" );
document.write( "...<BR>\n" );
document.write( "multiply first equation by 7 and second equation by 8 and add them<BR>\n" );
document.write( "56x+56y=2100<BR>\n" );
document.write( "56x-56y=800<BR>\n" );
document.write( "...<BR>\n" );
document.write( "112x=2900<BR>\n" );
document.write( "x= 25.89 <BR>\n" );
document.write( "plug the value of x in any equation you will get y = 11.6 speed of wind </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );