Which property is illustrated by this problem 10 . (11 . 12) ) = (10 . 11 ) . 12 commutative property of multiplication multiplicative identity associative property of multiplication

Given the graph below state whether or not the relation is a function, and give the domain and range.

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.

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?