Which choice describes a trapezoid?

Which of the following graphs represents the function f(x) = 2^x

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?

What are the solutions for the following system? -2x^2+y=-5 y=-3x^2+5