document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=37237>Question 37237</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0072549017/algebrahomeworkh>Beginning Algebra</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> 26. Science and medicine. A plane flies 720 mi against a steady 30-mi/headwind and then returns to the same point with the wind. If the entire trip takes 10h, what is the plane’s speed in still air?\r<BR>\n" );
document.write( "\n" );
document.write( "I think the problem should be stated like this but I'm not sure. I just can't seem to get it to work.<BR>\n" );
document.write( "(720/x-20)+(720/x+20)=12 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #22916 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley71><B>checkley71(8403)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley71><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=22916\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 720/(x+30)+720/(x-30)=10 or [720(x-30)+720(x+20)]/x+30)(x-30)=10 or\r<BR>\n" );
document.write( "\n" );
document.write( "(720x-21600+720x+216000)/(x~2-900)=10 or 10x~2-9000=1440x or\r<BR>\n" );
document.write( "\n" );
document.write( "10x~2-1440x-9000 or x~2-144x-900 or (x-150)(x+6)=0 or x=150mph\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );