Can someone help me with these worksheets pls

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?

Rewrite the following quadratic functions in intercept or factored form. show your work. f(x) = 3x^2 - 12

Olga bought a new skirt that cost $20. sales tax is 5%. how much did olga pay, including sales tax? 7.