Helll select all of the following sets of ordered pairs that are not function
A. (2,1), (9,4), (5,6), (2,7)
B. (3,1), (-3,1), (0,1), (5,1)
C. (1,1), (2,2), (3,3), (4,4)
D. (4,1), (6,7), (8,9), (4,7)
E. (2,4), 2,5), (2,6), 2,8)
hurrry pl

Janie has $3. she earns $1.20 for each chore she does and can do fractions of chores. she wants to earn enough money to buy a cd for $13.50. write an inequality to determine the number of chores, c, janie could do to have enough money to buy the cd.

There are 45 questions on your math exam. you answered 810 of them correctly. how many questions did you answer correctly?

Determine if the following statement is true or false. the normal curve is symmetric about its​ mean, mu. choose the best answer below. a. the statement is false. the normal curve is not symmetric about its​ mean, because the mean is the balancing point of the graph of the distribution. the median is the point where​ 50% of the area under the distribution is to the left and​ 50% to the right.​ therefore, the normal curve could only be symmetric about its​ median, not about its mean. b. the statement is true. the normal curve is a symmetric distribution with one​ peak, which means the​ mean, median, and mode are all equal.​ therefore, the normal curve is symmetric about the​ mean, mu. c. the statement is false. the mean is the balancing point for the graph of a​ distribution, and​ therefore, it is impossible for any distribution to be symmetric about the mean. d. the statement is true. the mean is the balancing point for the graph of a​ distribution, and​ therefore, all distributions are symmetric about the mean.