Solve 4x^2-16x-84 by factoring, completing the square and, by quadratic formula(show work, pls)

Through: (-3,-3) parallel to y= 7/3x+3

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 is the total surface area of this square pyramid?