Who is right a - 1/3 - (1/5+5/8) or b - 1/3 - 1/5 + 5/8

Find the constant of variation for the relation and use it to write an equation for the statement. then solve the equation.

The reflexive property of congruence lets you say that ∠pqr ≅

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.