How to factor X²+4x=8
1 answer:
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Answer:
Sandy will finish the race first.
Step-by-step explanation:
Let D be the total one sided distance in miles, ( between X and Y ),
We know that,
Since, from point X to point Y and back, Jack averages 30 miles per hour to point Y and 10 miles per hour back to point X.
So, the total time taken by Jack =
Also, Sandy averages 20 miles per hour in both directions,
So, the total time taken by Sandy =
∵ 0.133D > 0.10D
Hence, Sandy will finish the race first.