The answer is X=5, X=-2 and x=-4
The answer is a all of the points
Answer:

= 7.071067812
Step-by-step explanation:
hope this helps
The sum of all the measurements is just the average times the number.


So if the average of all 92 is 7 the sum of those is

The average of the last two is 7.2 so their sum is

That means the sum of the first 90 is

so the average of the first 90 is

cm