PLEASE HELPP MEEE WITHHH NUMBERSSS 9 AND 10

PLEASEEE HELPPP ME

Solve for x where 0 equation: cot^2x+2cotx+1=0

At a pizza shop 70% of the customers order a pizza 25% of the customers order a salad and 15% of the customers order both a pizza and a salad if s customer is chosen at random what is the probability that he or she orders either a pizza or a salad

The equation ip| = 2 represents the total number of points that can be earned or lost during one turn of a game. which best describes how many points can be earned or lost during one turn?