Mrs. Catz invited three of her friends
out for lunch. She paid $33 for food,
$17 for soft drinks, $3 for taxes, and
$6 for a tip. How much did she pay
per person?

What is the value of the expression below? 148+(-6)| + |– 35= 7|

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?

What is the equation of the parabola with focus (-1,-1) and directrix y=1?