There are fifteen children in the gym class who haven't yet been picked to be team leaders. if you need to select four, in how many ways can they be selected?
enter your answer.

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?

Adiverr from the university of florida women’s swimming and diving team is competing in the ncaa zone b championships

On #16 : explain how factoring a trinomial, ax^2+ bx+ c, when a does not equal 1 different from factoring a trinomial when a = 1.