document.write( "Question 833644: Carlos and Maria drove a total of 211 miles in 4 hours. Carlos drove the first part of the trip and averaged about 55 miles per hour. Maria drove the remainder of the trip and averaged 50 miles per hour. For approximately how many hours did Maria drive? round your answer to the nearest tenth if necessary. \n" ); document.write( "
Algebra.Com's Answer #502679 by richwmiller(17219)\"\" \"About 
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a+b=4,
\n" ); document.write( "55a+50b=211
\n" ); document.write( "a = 11/5= 2.2, b = 9/5 =1.8
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