If x+y=10 and x - y = 11, what is the value of x - 72

What two consecutive odd integers have a sum of -28

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?

Combine the information in the problem and the chart using the average balance method to solve the problem.