If ABC=DEF, which congruences are true by CPCTC? Check all that apply.

Solve the triangle. a = 21°, c = 105°, c = 5

The data set represents the ages of players in a chess club. 27, 34, 38, 16, 22, 45, 54, 60. what is the mean absolute deviation of the data set?

The table below shows the number of free throw shots attempted and the number of shots made for the five starting players on the basketball team during practice. each player's goal is to make 80% of her shots.