Each choice compares two expressions. Choose ALL pairs of expressions that are equivalent. A) y + y + y = 3y
B) 2c - 5 = (c X c) -5
C) K 2 + 3j = k + k + j + j + j
D) 3x + 2y = () + (y x y)
E) a3 + 2b = ( a x a x a) + (b +b)

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.