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victus00 [196]
3 years ago
11

A.

Mathematics
1 answer:
Vlad [161]3 years ago
8 0

Answer: a) 70 mph

b) 80 mph

Step-by-step explanation:

Given that Kayleen left home at noon and drove to boston.she got there at 4:00. Then time spent will be 4 hours . Noon means 12pm

Distance covered = 280 miles kayleens average speed will be

Speed = distance/time

Speed = 280/4 = 70 mph

Given that Elijah was already 40 miles closer than Kayleen was when she started

Distance covered by Elijah will be

Distance = 40 + 280 = 320

Time = 4 hours

Speed = 320/4 = 80 mph

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