document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=905927>Question 905927</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Two airplanes leave an airport at the same time and travel in opposite directions. One plane travels <BR>\n" );
document.write( "75<BR>\n" );
document.write( "/kmh<BR>\n" );
document.write( " slower than the other. If the two planes are <BR>\n" );
document.write( "6892km<BR>\n" );
document.write( " apart after <BR>\n" );
document.write( "4<BR>\n" );
document.write( " hours, what is the rate of each plane? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #549524 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=549524\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+ ALIGN=MIDDLE  ALT=\"+d+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = the distance in km the faster plane travels in km<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+6892+-+d+ ALIGN=MIDDLE  ALT=\"+6892+-+d+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = the distance the slower plane travels in km<BR>\n" );
document.write( "Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+ ALIGN=MIDDLE  ALT=\"+s+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = the speed of the faster plane in km/hr<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+-+75+ ALIGN=MIDDLE  ALT=\"+s+-+75+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = the speed of the slower plane in km/hr<BR>\n" );
document.write( "----------------------------------------<BR>\n" );
document.write( "Equation for faster plane:<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+s%2A4+ ALIGN=MIDDLE  ALT=\"+d+=+s%2A4+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Equation for slower plane:<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+6892+-+d+=+%28+s+-+75+%29%2A4+ ALIGN=MIDDLE  ALT=\"+6892+-+d+=+%28+s+-+75+%29%2A4+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "--------------------------<BR>\n" );
document.write( "Substitute (1) into (2)<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+6892+-+4s+=+%28+s+-+75+%29%2A4+ ALIGN=MIDDLE  ALT=\"+6892+-+4s+=+%28+s+-+75+%29%2A4+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+6892+-+4s+=+4s+-+300+ ALIGN=MIDDLE  ALT=\"+6892+-+4s+=+4s+-+300+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+8s+=+7192+ ALIGN=MIDDLE  ALT=\"+8s+=+7192+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+=+899+ ALIGN=MIDDLE  ALT=\"+s+=+899+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "and<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+-+75+=+824+ ALIGN=MIDDLE  ALT=\"+s+-+75+=+824+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "-----------------<BR>\n" );
document.write( "The speed of the faster plane is 899 km/hr<BR>\n" );
document.write( "The speed of the slower plane is 824 km/hr<BR>\n" );
document.write( "check:<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+6892+-+d+=+%28+s+-+75+%29%2A4+ ALIGN=MIDDLE  ALT=\"+6892+-+d+=+%28+s+-+75+%29%2A4+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+6892+-+d+=+824%2A4+ ALIGN=MIDDLE  ALT=\"+6892+-+d+=+824%2A4+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+6892+-+3296+ ALIGN=MIDDLE  ALT=\"+d+=+6892+-+3296+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+3596+ ALIGN=MIDDLE  ALT=\"+d+=+3596+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "and<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+s%2A4+ ALIGN=MIDDLE  ALT=\"+d+=+s%2A4+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+899%2A4+ ALIGN=MIDDLE  ALT=\"+d+=+899%2A4+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+3596+ ALIGN=MIDDLE  ALT=\"+d+=+3596+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "OK\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "  </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );