Natalie tried to evaluate the expression (4-3.2-3)".
(4-3.2-3)
= (8-3)
Step 1
= 80
Step 2
=
0
Step 3
Did Natalie make a mistake? If so, in which step?

Which of these triangle pairs can be mapped to each other using two reflections?

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1

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.