Dy/y + xysquare dx = 9xdx separable method

Given: pqrs is a parallelogram prove: pr and qs bisect each other at t

Which fraction is equal to 1hole and 2/5? a.3/5 b.75 c.57 d.73

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?