Jenny is buying gifts for her family. so far she has spent $45.95, and she has one more gift to buy. she started with a total of $60 to spend on all of her gifts.
write an inequality that shows how much she can spend on the final gift.
a) 45.95 + x ≥ 60
b) 45.95 + x ≤ 60
c) 60 + x ≥ 45.95
d) 60 + x ≤ 45.95

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?

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?

Which of these angles are complementary? a. 45o and 45o b. 63o and 117o c. 45o and 135o d. 90o and 45o