How do I graph this polynomial function?

Mustafa contributes 11% of his $67,200 annual salary to his 401k plan. what is his pretax income

What are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2

Aball is dropped from a height of 10m above the ground. it bounce to 90% of its previous height on each bounce. what is the approximate height that the ball bounce to the fourth bounce?