I'll mark you brainlist and give you 5 star I just need a lot of help if you cant see btw its going from 1-9

Find the value of the cosine for angle a

How can constraints be used to model a real-world situation?

Match the vocabulary to the proper definition. in probability, two events in which 1. conditional probability the outcome of one event is independent of the outcome of a second event. 2. dependent events in probability, two events in which the outcome of one event is dependent on the outcome of a second event. the probability of an event in which the outcome of the event is conditional on the outcome of one or more different events. 3. independent events