Calvin took his friends to a movie for his birthday. the movie tickets cost $12 per person. he spent less than $180.if x is the number of friends he took along, then the inequality that represents the situation is

The inequality should be

The sign on the right is only a 'smaller than' sign because he spent less than 180.
On the left, assuming that even if Calvin took nobody (poor Calvin), we should assume that he at least went himself, hence he spent a minimum of $12.