These are 15 Algebra 2/Pre Calculus warm-ups, do-nows, bell-ringers, entrance/exit tickets or mini-quizzes/mini homework on quadratic functions, quadratic inequalities, system of quadratic inequalities and nonlinear systems. Each of them is a half-sheet in size and contains from 4 to 6 problems. Topics included: Axis and Vertex of a Quadratic FunctionVertex Form of a Quadratic FunctionDomain and Range of a Quadratic FunctionX- and Y- Intercepts of a Quadratic FunctionMonotonicity Intervals of a