What is the area of this?

Translate the word phrase into a math expression. 15 fewer than the product of 4 and a number. (pls immediately)

Simply 8x squared + 5(7x squared- x) - 2x =

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.