Solve for angle x and the length of line segments AO and BO

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

5, 6, 10 question: a. determine whether the side lengths form a triangle. (explain your reasoning) b. if it is a triangle, determine whether it is a right, acute, or obtuse triangle. (show your work)

The candy store is having a 30% off sale. emma is going to buy $7.50 worth of candy. how much will she pay after the discount