document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=76773>Question 76773</A>: <I><SPAN STYLE=\"word-break: break-all;\"> help me solve this please?\r<BR>\n" );
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document.write( "Science and medicine. A plane flies 720 mi against a steady 30-mi/h headwind<BR>\n" );
document.write( "and then returns to the same point with the wind. If the entire trip takes 10 h, what is the plane’s speed 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 #55105 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley75><B>checkley75(3666)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley75><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=55105\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> DISTANCE=RATE*TIME SEEING AS THESE DISTANCES ARE THE SAME WE HAVE THE EQUATION<BR>\n" );
document.write( "(720-30)X=(720+30)(10-X)<BR>\n" );
document.write( "690X=750(10-X)<BR>\n" );
document.write( "690X=7500-750X<BR>\n" );
document.write( "690X+750X=7500<BR>\n" );
document.write( "1440X=7500<BR>\n" );
document.write( "X=7500/1440<BR>\n" );
document.write( "X=5.208 HOURS FOR THE FIRST TRIP &<BR>\n" );
document.write( "10-5.208=4.792 FOR THE RETURN TRIP.<BR>\n" );
document.write( "PROOF<BR>\n" );
document.write( "690*5.208=750*4.792<BR>\n" );
document.write( "3594=3594 </SPAN>\n" );
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