A square has side length 4 cm. What is its area in cm squared?

Is the following relation a function? x y 1 4 −1 −2 3 10 5 16 yes no

Which of the following is an equation of a line parallel to the equation y=4x+1?

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?