I need help wit this

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

Amachine part consists of a half sphere and a cylinder, as shown in the figure. the total volume of the part is π cubic inches.

Determine the solution to the given equation. 4 + 3y = 6y – 5 a. y = 3 b. y = –3 c. y = 1 d. y = –1 select the best answer from the choices provided a b c d