document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1048206>Question 1048206</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Two planes left the same airport at the same time traveling in opposite directions. The first plane traveled at an average rate of 30 mph slower than the second plane. After 3 hours, the planes were 3150 miles apart.\r<BR>\n" );
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document.write( "Enter an equation that can be used to determine when the planes are 3150 miles apart, where x represents the average rate of the second plane.\r<BR>\n" );
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document.write( "Enter the average rate of change of the slower plane.<BR>\n" );
document.write( "Equation: \r<BR>\n" );
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document.write( "Average rate of change: <BR>\n" );
document.write( " mph </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #663790 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=663790\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> first plane's speed is x-30 mph<BR>\n" );
document.write( "second plane's speed is x mph<BR>\n" );
document.write( "After 3 hours, they are 3150 miles apart=3*(2x-30 )mph, their combined speed.<BR>\n" );
document.write( "6x-90=3150<BR>\n" );
document.write( "6x=3240<BR>\n" );
document.write( "x=540 mph second plane<BR>\n" );
document.write( "Check<BR>\n" );
document.write( "First  plane's speed is x-30 or  510 mph ANSWER<BR>\n" );
document.write( "Second plane's speed is 540 mph<BR>\n" );
document.write( "Every hour, they are 1050 miles further apart.<BR>\n" );
document.write( "After 3 hours, they are 3150 miles apart. </SPAN>\n" );
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