document.write( "Question 356677: On a 5 hour trip, Thomas drove part of the time at 30 mi/h and the rest at 55 mi/h. If he traveled a distance of 250 mi, how much time did he spend driving at 55 mi/h? \n" ); document.write( "
Algebra.Com's Answer #254641 by mananth(16946)\"\" \"About 
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On a 5 hour trip, Thomas drove part of the time at 30 mi/h and the rest at 55 mi/h. If he traveled a distance of 250 mi, how much time did he spend driving at 55 mi/h?
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\n" ); document.write( "let the first leg distance traveled be xmiles\r
\n" ); document.write( "\n" ); document.write( "speed = 30mph
\n" ); document.write( "time = x/30 hours
\n" ); document.write( "...
\n" ); document.write( "next leg = 250-x miles
\n" ); document.write( "speed = 55 mph
\n" ); document.write( "time = 250-x / 55
\n" ); document.write( "...
\n" ); document.write( "x/30 + (250-x)/55 =5
\n" ); document.write( "30(250-x)+55x=5*30*55
\n" ); document.write( "7500-30x+55x=5*30*55
\n" ); document.write( "25x= 8250-7500
\n" ); document.write( "25x=750
\n" ); document.write( "x=30 miles
\n" ); document.write( "speed = 30mph
\n" ); document.write( "distance = 30 miles
\n" ); document.write( "time = 1 hour
\n" ); document.write( "so he drove 4 hours at 55mph
\n" ); document.write( "...
\n" ); document.write( "m.ananth@hotmail.ca \n" ); document.write( "
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