100 divided by 3.2 Thank u

When 142 is added to a number the result is 64 more then 3 times the number. option 35 37 39 41

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?

2. explain in words how you plot the point (4, −2) in a rectangular coordinate system.