Solve -3= + 5 using the replacement set {-32, 8, 32}
0 -32
08
0 32
I don't know

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?

Which coefficient matrix represents a system of linear equations that has a unique solution ? options in photo*

Ineed with question three. i don't understand how i'm supposed to achieve 3 marks.