free points anyone if you really want them answer anything i quit using and i hope yall enjoy it

Which of the following is the true for f(x) = 5cos

How do the number line graphs of the solutions sets of -23 > x and x-23 differ?

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?