Which expression correctly shows 2x^5y−2x^2y factored completely over the integers?

A.−2x^2y(x+1)(x^2−x+1)

B.2xy(x−1)(x^2+x+1)

C.2x^2(x−y)(x+y)

D.2x^2y(x−1)(x^2+x+1)

E.2x^2(x−y)(x^2+xy+y^2)

What are “like terms”? why can we only add like terms?

In a test for esp (extrasensory perception), a subject is told that cards only the experimenter can see contain either a star, a circle, a wave, or a square. as the experimenter looks at each of 20 cards in turn, the subject names the shape on the card. a subject who is just guessing has probability 0.25 of guessing correctly on each card. a. the count of correct guesses in 20 cards has a binomial distribution. what are n and p? b. what is the mean number of correct guesses in 20 cards for subjects who are just guessing? c. what is the probability of exactly 5 correct guesses in 20 cards if a subject is just guessing?

In the diagram, bc¯¯¯¯¯∥de¯¯¯¯¯ . what is ce ? enter your answer in the box.