Dylan buys 3.2 pounds of grapes for $2.56. What is the price per pound of the grape.

An equation of the line tangent to y=x^3+3x^2+2 at its point of inflection is

Aubrey read 29 books and eli read 52 books what number is equal to the number of books aubrey read?

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?