can anyone help me with this question? It’s the only one I don’t get. Any help would be much appreciated! Thanks!!

Solve -2(4y + 6) = 52. 5 -5 8 -8 and !

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?

What is perpendicular to y=-1/2x+11