Answer:
x=25/6
Step-by-step explanation:
3x+11=9x-14
11=6x-14
25=6x
x=25/6
The answer would be 2 1/3 or 2.3 repeating or 7/3
80 is a good one to start with.
After that, you can move on to 83, 481, 1687, and 102,974,589 .
This is the "empirical rule." Approx. 68% of a data set lie within one standard deviation of the mean.