What are some numbers with a sum of 1

Find the quotient. 50a2 – 98b2 -5a +7b

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 the given system of equations. 2y= -x+9 , 3x-6= -15