Trong các hàm số sau, hàm số nào là hàm chẵn? A. cos 3 y x          B. y x  sin C. y x  1 sin D. y x x

Solve: 3x+y=6 4x-2y=18 show all work !

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?

Draw a tape diagram to represent each situation.for some of the situations,you need to decide what to represent with a variable andre bakes 9 pans of brownies.he donates 7 pans to the school bake sale and keeps the rest to divide equally among his class of 30 students