A hotel manager is adding a tile border around the​ hotel's rectangular pool. Let p represent the width of the​ pool, in feet. The length is 3 more than 3 times the​ width, as shown. Write two expressions that represent the perimeter of the pool.

Mrs. morton has a special reward system for her class. when all her students behave well, she rewards them by putting 3 marbles into a marble jar. when the jar has 100 or more marbles, the students have a party. right now, the the jar has 24 marbles. how could mrs. morton reward the class in order for the students to have a party?