document.write( "Question 104181This question is from textbook algebra and trigonometry
\n" ); document.write( ": at 10:30 A.M two planes leave Houston, one flying east at 560 km/h and the other fliying west at 640 km/h. At what time will they be 2100 km apart? \n" ); document.write( "
Algebra.Com's Answer #75800 by checkley75(3666)\"\" \"About 
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640X+560X=2100
\n" ); document.write( "1200X=2100
\n" ); document.write( "X=2100/1200
\n" ); document.write( "X=1.75 OR 1 HOUR 45 MINUTES AFTER THEY LEAVE THEY'LL BE 1200 MILES APART.
\n" ); document.write( "10:30+1:45=12:15 PM.
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