A bag contains 10 red and 10 blue marbles. What is the minimum number of marbles that should be grabbed from the bag at random so that five marbles are of the same color?

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?

Which equation is y = -6x2 + 3x + 2 rewritten in vertex form?

Which statement accurately describes how to perform a 90° clockwise rotation of point a (1,4) around the origin?