Novak wants to print books and magazines. He wants to print a total of at least 404040 books and magazines (condition AAA), with at most 360036003600 sheets of paper (condition BBB). The graph below represents the constraints on the number of books KKK and magazines MMM Novak prints:Novak prints 303030 books. How many magazines can he print to meet both his constraints?

see picture below:

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

Assume that there is a 11% rate of disk drive failure in a year. a. if all your computer data is stored on a hard disk drive with a copy stored on a second hard disk drive, what is the probability that during a year, you can avoid catastrophe with at least one working drive? b. if copies of all your computer data are stored on four independent hard disk drives, what is the probability that during a year, you can avoid catastrophe with at least one working drive?

Find the axis symmetry of x y=4x-6x+3