document.write( "Question 1057908: Two planes just took off from St. Louis, MO. The first plane is traveling 1.5 times as fast as the second plane. After traveling in the same direction for 7 hours, they are 367.5 miles apart. What is the average speed of each plane? \n" ); document.write( "
Algebra.Com's Answer #672907 by Boreal(15235)\"\" \"About 
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speed of second plane is x mph
\n" ); document.write( "speed of first plane is 1.5x mph
\n" ); document.write( "After 7 hours, plane 1 has gone 7x miles, and plane 2 10.5 x miles
\n" ); document.write( "That is a difference of 3.5x and that is 367.5 miles
\n" ); document.write( "Therefore x is 105 mph plane 1
\n" ); document.write( "1.5 x is 157.5 mph
\n" ); document.write( "After 7 hours, it is 735 miles for plane 1 and 1102.5 miles for plane 2. ANSWER
\n" ); document.write( "That is a difference of 367.5 miles.
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