The solution to a system of linear equations is (-3, -3). which system of linear equations has this point as its solution?
i'm being timed!

Math it's appreciated. (picture provided)

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?

Acircle has a radius of 12.6cm what is the exact length of an arc formed by a central angle measuring 120