In which step does a mistake first appear in simplifying the expression -2 (3a - 5) + 1.5 (6a - 10) +4(a -2) ?

Find the solution of system of equation y= x-4 y=4x+2

What value of x is in the solution set of 4x - 12 s 16 + 8x? -10 -9 -8 -7

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.