Area and volume math question pretty simple please help no explanation needed just answers

Which of the binomials below is a factor of this trinominal? x^2-13+30

True or false: the graph of y=f(bx) is a horizontal compression of the graph y=f(x) if b< 1

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?