What's the midpoint segment with the endpoints being (-5,9) and (8,14)

The vet charges $45 for an office visit and $10 for each vaccination your dog needs. write an eaquation

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?

Use the given information to determine the exact trigonometric value.