SOLUTION: this is a Exam Review, i havent done these kind of problems since the beginning of the school year so i have a blind picture of how to do this problem.
Carlos and Maria drove a
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-> SOLUTION: this is a Exam Review, i havent done these kind of problems since the beginning of the school year so i have a blind picture of how to do this problem.
Carlos and Maria drove a
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Question 120120This question is from textbook texas algebra 1
: this is a Exam Review, i havent done these kind of problems since the beginning of the school year so i have a blind picture of how to do this problem.
Carlos and Maria drove a total of 258 miles in 5 hours. Carlos drove the first part of the trip and averaged 53 miles per hour. Maria drove the remainder of the trip and averaged 51 miles per hour. For appoximately how many hours did Maria drive? Round your answer to the nearest tenth if neccesary.
Thanks, I hope you reply soon :D This question is from textbook texas algebra 1
You can put this solution on YOUR website!
Distance(d) equals rate(r) times time(t) or d=rt; r=d/t and t=d/r
Let t=driving time for Maria
then 5-t=driving time for Carlos
Distance Maria drove=51*t
Distance Carlos drove=53*(5-t)
Now we are told that the distance Maria drove plus distance Carlos drove =258 mi
so:
51t+53(5-t)=258 get rid of parens
51t+265-53t=258 subtract 265 from both sides
51t+265-265-53t=258-265 collect like terms
-2t=-7 divide both sides by -2
t=3.5 hr-----------------------------driving time for Maria
5-3.5=1.5hr-----------------------driving time for Carlos
CK
53*1.5+51*3.5=258
79.5+178.5=258
258=258
Hope this helps---ptaylor
