document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=729295>Question 729295</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A plane can travel 975 miles with a 40 mph tailwind in the same time it can travel 800 miles with a 30 mph headwind. How fast an the plane travel with no wind resistance? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #446151 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley79><B>checkley79(3341)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley79><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=446151\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> D=RT<BR>\n" );
document.write( "975=(R+40)T<BR>\n" );
document.write( "T=975/(R+40)<BR>\n" );
document.write( "800=(R-30)T<BR>\n" );
document.write( "T=800/(R-30)<BR>\n" );
document.write( "THE TIMES ARE EQUAL SO:<BR>\n" );
document.write( "975/(R+40)=800/(R-30)<BR>\n" );
document.write( "975(R-30)=800(R+40)<BR>\n" );
document.write( "975R-29,250=800R+32,000<BR>\n" );
document.write( "975R-800R=32,000+29,250<BR>\n" );
document.write( "175R=61,250<BR>\n" );
document.write( "R=61,250/175<BR>\n" );
document.write( "R=350 MPH. IN STILL AIR IS THE SPEED.<BR>\n" );
document.write( "975=(350+40)T<BR>\n" );
document.write( "975=390T<BR>\n" );
document.write( "T=975/390<BR>\n" );
document.write( "T=2.5 HOURS<BR>\n" );
document.write( "PROOF:<BR>\n" );
document.write( "800=(350-30)*2.5<BR>\n" );
document.write( "800=320*2.5<BR>\n" );
document.write( "800=800 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );