In the diagram, AB is parallel to DE .Also, DE is drawn such that the length of DE is half the length of AB If sin A = 0.5, then what is sin ? E B OA 2 OB. 1 OC. 0.5 OD 0.25

The total cost of anja’s trip to the dentist was $628.35. she paid a flat fee of $89.95 which included the checkup and cleaning and then had 4 cavities filled, each of which cost the same amount. which shows the correct equation and value of x, the cost of each cavity filling?

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

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?