document.write( "Question 639372: Rick and Mike are roommates and leave Gainesville on Interstate 75 at the same time to visit their girlfriends for a long weekend. Rick travels north and Mike travels south. If Mike's average speed is 6 mph faster than Rick's, find the speed of each if they are 213 miles apart in 1 hour and 30 minutes.
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Algebra.Com's Answer #402706 by mananth(16946)\"\" \"About 
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Rick's speed x mph
\n" ); document.write( "Mike's speed = x+ 6 mph
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\n" ); document.write( "They are moving away from each other
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\n" ); document.write( "So add up their speed.
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\n" ); document.write( "combined speed = x+ 1 x + 6
\n" ); document.write( "( 2 x + 6 )
\n" ); document.write( "Time = 1.5 hours
\n" ); document.write( "Distance = 213 miles
\n" ); document.write( "Distance = speed * time
\n" ); document.write( "( 2 x 6 )* 1.5 = 213
\n" ); document.write( "3.00 x + 9 = 213
\n" ); document.write( "3 x = 213 + -9
\n" ); document.write( "3 x = 204
\n" ); document.write( "/ 3
\n" ); document.write( "x= 68 mph
\n" ); document.write( "Rick's speed = 68 mph
\n" ); document.write( "Mike's speed = 68 + 6 = 74 mph
\n" ); document.write( "m.ananth@hotmail.ca
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