Suppose u= the set of one digit number and A= (x:x is an even number less than or equal to 9 Describe each of sets by complete listing method 1. A'
2. AnA'
3. AuA
4 (A')'
5. ( )-u
6. ( )
7. U'​

Solve: 3x+y=6 4x-2y=18 show all work !

3.17 scores on stats final. below are final exam scores of 20 introductory statistics students. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 57, 66, 69, 71, 72, 73, 74, 77, 78, 78, 79, 79, 81, 81, 82, 83, 83, 88, 89, 94 (a) the mean score is 77.7 points. with a standard deviation of 8.44 points. use this information to determine if the scores approximately follow the 68-95-99.7% rule. (b) do these data appear to follow a normal distribution? explain your reasoning using the graphs provided below.

What is r i 4.5+10r=-6.5 with work pls