13 is atleast the difference of a number v and 1

Simplify.7x + 3y - 2 + 6x + 1 + y squared 2 you! ; )

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?

2.5 milligrams is equivalent to how many grams