Identify a pattern in each lists of numbers. Then use this pattern to find the next number. 17,13,9,5,1

Divide. write in the simplest form. 4 1/6 divided by 10

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.

Which equation is y = -6x2 + 3x + 2 rewritten in vertex form?