on a bike trip, you traveled 21 miles on
the second day. on the 3rd day, you traveled 3
second day.
e trip, you traveled 21 miles on the first day, and n miles on
y. on the 3rd day, you traveled 5 miles less than on the rest
a. write an expression for the number of miles traveled in three day
b. simplify the expression. explain each step.
c. find the number of miles traveled in three days when you traveled
19 miles on the second.

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.