Answer:
8
Step-by-step explanation:
To find the mean, you add up all the numbers and divide it by the total number of numbers. So 4+5+7+8+11+13 is 48. There are 6 numbers. So 48/6=8.
Answer:

Step-by-step explanation:

No The people in a football game would not be a random sample from the school
I hope this helps you
3x-5+5=9+5
3x=14
x=4,66666....