If 75% of a number is 285 and 10% of the same number is 38, find 85% of that number.

Can i get some on 18,20,& 22? or one of them

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?

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10