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nydimaria [60]
3 years ago
5

Andy's average driving speed for a 4-hour trip was 45 miles per hour. during the first 3 hours he drove 40 miles per hour. what

was his average speed for the last hour of his trip?
Mathematics
1 answer:
777dan777 [17]3 years ago
8 0

3*40 + x / 4 = 45.


The answer of x comes out to be 60. Which means that the speed was travel around 60 miles per hour in the last one hour of the total journey.

Well to understand how i constructed its equation is very simple. I equated the total average speeds answer to 45 and just calculated the average speeds with the help of algebra where x is the number of miles..


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