Question

Sally is going on a vacation with her family. In 2 hours they travel 90.5 miles. If they travel at the same speed, write an equation that represents how far they will travel, d, in h hours

Answer 1

Let d= distance in miles

Let h= time in hours

45.25h= d

Answer 2

`d=45.25h`

Explanation:

This constant motion is represented by:

`d=st`

Where
`d` is distance,
`s` is speed and
`t` is time.

We know that in 2 hours they travel 90.5 miles, this gives us a speed of:

`s=(d)/(t)=(90.5)/(2)mi/hr=45.25mi/hr`

But, the problem is asking for a general expression:

`d=st\\d=(90.5)/(2)t\\ d=45.25h`

Therefore, they travel a distance
`d` in
`h` hours, according to the expression

`d=45.25h`