Which quadratic function has a vertex at (1, -2) and passes through the point (-11, 46)?

Ifurniture stores having a weekend sale and is offering 20% discount on patio chairs and table the sales tax on furniture is 6.25 using function composition how can you represent the total amount a that you would need to pay for this furniture that cost x dollars

What percent of the circle below is shaded?

Ineed in figuring out this problem.