What where's the next expression 24 - 6 + 3

Identify the converse of the following conditional: if a point is in the first quadrant, then its coordinates are positive. if the coordinates of a point are not positive, then the point is not in the first quadrant. if the coordinates of a point are positive, then the point is in the first quadrant. if a point is in the first quadrant, then its coordinates are positive. if a point is not in the first quadrant, then the coordinates of the point are not positive.

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

An octagonal prism has jow many lateral faces?