Which triangles are similar by the angle-angle criterion for similarity of triangles ?

Convert 16 yards to feet use the conversion rate 3 feet = 1 yard

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?

Factor the polynomial. b^2 + 4b + 4