If the relative frequency of getting a `blue` on spinner is 0.1, how many reds would you expect to get in 50 spins ?

Atriangle has sides with lengths of 10 yards, 13 yards, and 18 yards. is it a right triangle?

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?

What function has a range {yly< 5}? question on picture above^