document.write( "Question 809337: Kent drives his Mazda 312 miles in the same time that it takes Dave to drive his Nissan 270 miles. If Kent averages 7 miles per hour faster than Dave, find their rates. \n" ); document.write( "
Algebra.Com's Answer #487546 by TimothyLamb(4379)\"\" \"About 
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s = d / t
\n" ); document.write( "k = 312/T
\n" ); document.write( "d = 270/T
\n" ); document.write( "k = d + 7
\n" ); document.write( "---
\n" ); document.write( "k = d + 7
\n" ); document.write( "312/T = 270/T + 7
\n" ); document.write( "312 = 270 + 7T
\n" ); document.write( "7T = 42
\n" ); document.write( "T = 6 hours
\n" ); document.write( "---
\n" ); document.write( "Answer:
\n" ); document.write( "k = 52 mph
\n" ); document.write( "d = 45 mph
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