Abag of numbered lottery balls contains the numbers 1 through 40. what is the probability that a randomly selected ball will be a number that is not a multiple of 13?

How do you use the elimination method for this question? explain, because i really want to understand!

Miguel’s teacher asks him to color 4/8 of his grid. he must use 3 colors: red, blue, and green. there must be more green sections than red sections. how can miguel color all the sections of his grid to follow all the rules

If x is 6, then 7x= a. 13 b. 42 c. 42x d. 76