If a= (-1, -3) and b= (11, -8) what is the length of ab a) 14 units b) 11 units c) 13 units d) 12 units

What does the sign of the slope tell you about a line?

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?

Let x = a + bi and y = c + di and z = f + gi. which statements are true?