document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=225444>Question 225444</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A six passenger plane cruises at 180mph in calm air. If the plane flys 7 miles with the wind in the same amount of time as it flys 5 miles against the wind, what is the wind speed. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #168282 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley77><B>checkley77(12844)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley77><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=168282\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> D=RT OR T=D/R<BR>\n" );
document.write( "T=7/(180-W)<BR>\n" );
document.write( "T=5/(180+W)<BR>\n" );
document.write( "SET THE 2 TIME EQUATIONS EQUAL & SOLVE FOR THE WIND SPED.<BR>\n" );
document.write( "7/(180-W)=5/(180+W)<BR>\n" );
document.write( "5(180-W)=7(180+W)<BR>\n" );
document.write( "900-5W=1,260+7W<BR>\n" );
document.write( "-7W-5W=1,260-900<BR>\n" );
document.write( "-12W=360<BR>\n" );
document.write( "W=360/-12<BR>\n" );
document.write( "W=-30 MPH IS THE WIND SPEED.<BR>\n" );
document.write( "PROOF:<BR>\n" );
document.write( "7/(180-(-30))=5(180/(180+(-30))<BR>\n" );
document.write( "7/(180+30)=5(180-30)<BR>\n" );
document.write( "7/210=5/150<BR>\n" );
document.write( "5*210=7*150<BR>\n" );
document.write( "1,050=1,050 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );