Elena bought a book for 25 percent less than the original price.
The original price was y dollars.
Which of the following expressions could be used to find the reduced price of the book in one step?

Find an equation of the line perpendicular to the graph.

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?

Logan wants to know how many skateboards have defective parts. he inspects 20,000 skateboards and keeps track of the number of defects per board. use his probability distribution table to find the expected value for defects on a skateboard.