For a corporation that has 2,500,000 shares of stock, how may shares would be needed to be a majority stock holder ? *

Find the midpoint m of z1=(8+5i) and z2=(12+3i)

Use the elimination method to solve the systems of equations.choose the correct ordered pair. 7x+4y=39

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?