How many outcomes are possible if you pick a state and visit that state on one of the 12 months of the year

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

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.

Find the solution of each of the following.