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Janet and her parents are going to visit scotsbury college, which is 420 miles from where they live. they plan to drive for 4.5 hours on the first day, then stop at a hotel for the night and complete the trip on the second day. they expect their average speed will be 60 miles per hour. which equation can janet use to predict how many hours, h, they will drive on the second day?



Answer :

Janet can use an equation 60 = 420 / (4.5 + h) to predict the number of hours they will drive on the second day.

In this question, we have been given that the distance between Janet's college and Janet's home is 420 miles.

d = 420 miles

Janet and her parents plan to drive for 4.5 hours on the first day, then stop at a hotel for the night and complete the trip on the second day.

Let they drive for 'h' hours on the second day.

This means, total time = (4.5 + h) hours

They expect their average speed will be 60 miles per hour.

Using the formula of speed,

speed = distance / time

60 = 420 / (4.5 + h)

Janet can use above equation to predict the number of hours they will drive on the second day.

We need to find the value of h.

4.5 + h = 420 / 60

4.5 + h = 7

h = 2.5 hours

This means, they will drive for 2.5 hours on the second day.

Therefore, Janet can use an equation 60 = 420 / (4.5 + h) to predict the number of hours they will drive on the second day.

Learn more about the speed here:

https://brainly.com/question/2004627

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