Apuppy named chance started out at 4 pounds and gained 1 pound every month. at how many months did chance weigh 13 pounds?

Write a function for a rotation 90 degrees counter clockwise about the origin, point 0

What is the radical expression that is equivalent to the expression 27 1 over 5?

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?