Answer this quickly.
match the expressions to their solutions or equivalents.

1. -1
2. 1/2
3. -1/2
4. 0
5. -4
6. -1/3
7. -2
8. 4

1. the gcf of 28 and 60
2. (-3/8) + (-5/8)
3. -1/6 ÷ 1/2
4. solution of 0.5 x = -1
5. solution of 1/2 m = 0.
6. -4 5/6 + 5 1/3
7. -2 1/3 ÷ 4 2/3
8. not a solution of -4 < x

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.