This weekend, jerome earned 252.50 in all. whhat was the dollar amount of the meals that jerome served. jerome earns 15%percent off all the costs of meal on all meals and he earns 80 dollars every weekend

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?