Agroup of friends of 31 friends gets together to play a sport. first, people must be divided into teams. each team has to have exactly 3 players, and no one can be on more than one team. how many teams can they make? (it is possible that not everyone can be on a team.)

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Over the course of the school year, you keep track of how much snow falls on a given day and whether it was a snow day. your data indicates that of twenty-one days with less than three inches of snow, five were snow days, while of the eight days with more than three inches of snow, six were snow days. if all you know about a day is that it is snowing, what is the probability that it will be a snow day?

Amir wants to proportionally increase the size of a photo to create a poster for his room. the size of the original photo is shown. complete the statement and then answer the question to represent ways that amir can increase the size of his photo.