Ann thought of a number n, multiplied it by 5 and added 7. then she told the result r to jim. a) find the domain and the range of this function. b) draw a graph that shows how r depends on n c) write a formula that will tell you the value of r for any value of n. d) using the previous formula, write the formula that could jim guess anne's number n

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?