Alice solved the following equation: -18 - 3 x = 12 -3 x = 6 x =-2 which of the following statements is true? alice is correct. the 6 should be 30 in step two. the 6 should be -6 in step two. the 6 should be -4 in step two.

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?