Choose the pair of lines in the diagram that appear to be noncoplanar
A. AB and CB
B. DC and BB
C. CB and DC
D. XY and AB

Which of the following system of equation is not equal to the system of equations is not equal to the system of equations shown below

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?

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?