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2-78.

What happens if Cecil goes any number of feet in one direction and then goes the same number of feet the other direction? Where does he end up? How do you know? Homework Help ✎

If you are having trouble with this problem, try it yourself.
Take steps away from the computer, then turn around and take steps back.
Where do you end up?
Try this with any number of steps. Where do you end up?