Bye people see you never again... *Sobs* ILL MISS YOU MY FRIENDS

In the figure shown below, m < 40 and ab =8. which equation could be used to find x?

What percent of the circle below is shaded?

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?