Find the mean and range. 18 23 10 39 22 17 16 15 mean = 18.1; range = 28 mean = 20; range = 29 mean = 20; range = 32 mean = 21.9; range = 29

1. what is the measure of ∠abc? what is the measure of ∠abd?

Complete the statements about the system of linear equation respresented by the tables the equation respented the left table is

Non-euclidean geometry was discovered when, in seeking cleaner alternatives to the fifth postulate, it was found that the negation could also be true a. true b.false