Select the sets that are not functions. B = {(1, 2), (2, 1), (3, 0), (4, -1)}
D = {(1, 1), (1, 2), (1, 3), (1, 4)}
A = {(1, 2), (2, 3), (3, 4), (4, 5)}
C = {(-1, 3), (0, 3), (1, 3), (2, 3)}
E = {(6, 2), (7, 3), (6, -1), (5, 4)}

What is not true about kl and mn? what is mn? (show your work)

Galen sold tickets of his church’s carnival for a total of $2,820. children’s tickets cost $3 each and adult tickets cost $5 each. the number of children’s tickets sold was 30 more than 3 times the number of adult tickets slod. how many children’s ticket and how many adult tickets did he sell?

Jose is going to use a random number generator 500500 times. each time he uses it, he will get a 1, 2, 3,1,2,3, or 44.