There are 150 people in the library. If 60 of them are girls, what percent of the people in the library are girls?

What is the range for 31,39,29,34,37,24,36,33,34,28

Write an equation for the function that includes the points (2,100)and (3,100)

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?