Determine whether the angle shown is acute, obtuse, right or straight.

What is the range? can’t seem to find it out

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?