5. How can you rewrite 7 - 13 ?

a.13 - 7
b. -13 +-7
c. 7+ (-13)
d. -7 + 13

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?

How many solutions does the nonlinear system of equations graphed below have? a. one b. zero c. four d. two

Factor and solve to find roots x squared -x - 90 =0