Apair of dice are thrown. what is the expected value of the sum? se of the sum?

Which best explains why this triangle is or is not a right triangle?

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.

What statement is true? 2x^2-9x+2=-1