If the pizza is cut into 12 equal slices, what is the size of the sector angle of a slice of pizza​

Pls! does anybody know a shortcut for answering these types of questions in the future?

When only separate discreet points are graphed it is called?

Determine whether the points (–3,–6) and (2,–8) are in the solution set of the system of inequalities below. x ? –3 y < 5? 3x + 2 a. the point (–3,–6) is not in the solution set, and the point (2,–8) is in the solution set. b. neither of the points is in the solution set. c. the point (–3,–6) is in the solution set, and the point (2,–8) is not in the solution set. d. both points are in the solution set.