If point a is located at (-7, 5) on a coordinate plane, and point b is located at (4, 5) what is the distance between the two points

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?

Find two numbers if their sum is 91 and the ratio is 6: 7?

What is the inverse of the function fx = 2x-10