the points in the shaded region satisfy three inequalities y<=1 is one of them which of these are the other two inequalites

Acar dealership pays you 5% commission on your first $10,000 on car sales and 8% commission on the sale amount over $10,000 if you sold a $12,000 car how much is your commission

Find the vertex of the function given below y=x^2-6x+1

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?