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## Homework Statement

Driving along a crowded freeway, you notice that it takes a time t to go from one mile marker to the next. When you increase your speed by 7.7mi/h , the time to go one mile decreases by 15s. What was your original speed?

v

_{1}= ?

d

_{1}= 1 mile

t

_{1}= ?

v

_{2}= v

_{1}+ 7.7mi/h

d

_{2}= 1 mile

t

_{2}= t

_{1}- 15 seconds

## Homework Equations

I'm not sure... We have not covered this in class yet, and we have yet to cover one dimensional kinematics (which is next week). I've seen some equations regarding velocity initial, velocity final, etc., but I don't know how to implement them. The only equations I can come up with are these:

[itex]s_1 = \frac{d_1} {t_1}[/itex]

[itex]s_1 = \frac{1 mile} {t_1}[/itex]

[itex]s_2 = \frac{d_2} {t_2} [/itex]

[itex]s_2 = \frac{1 mile} {t_! - 15 seconds} [/itex]

## The Attempt at a Solution

This is what I have written on my paper so far:

[itex]\frac{1 mile} {t_1} = \frac{1 mile} {t_1 -15 seconds}[/itex]

Edit: Umm, not sure where I went wrong with my LaTeX...?

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