Answer:
Insert 0 for the x and insert -2 for the y.
It looks like:
-5(0) + -2 = -2
-5 times 0 is zero
0 + -2 = -2
So -2 = -2
Do you understand?
Hope this helps!
Please mark me brainliest!
~Courtney
D should also be circled, in addition to E.
I hope this helped! Good luck! :)
The sum of all the measurements is just the average times the number.
![\bar x = \frac{1}{n} \sum_{i=1}^n x_i](https://tex.z-dn.net/?f=%5Cbar%20x%20%3D%20%5Cfrac%7B1%7D%7Bn%7D%20%5Csum_%7Bi%3D1%7D%5En%20x_i%20)
![\sum_{i=1}^n x_i = n \bar x](https://tex.z-dn.net/?f=%20%5Csum_%7Bi%3D1%7D%5En%20x_i%20%3D%20n%20%5Cbar%20x%20)
So if the average of all 92 is 7 the sum of those is
![92 \times 7](https://tex.z-dn.net/?f=92%20%5Ctimes%207)
The average of the last two is 7.2 so their sum is
![2 \times 7.2](https://tex.z-dn.net/?f=2%20%5Ctimes%207.2)
That means the sum of the first 90 is
![92 \times 7 - 2 \times 7.2](https://tex.z-dn.net/?f=92%20%5Ctimes%207%20-%202%20%5Ctimes%207.2)
so the average of the first 90 is
![\dfrac{92 \times 7 - 2 \times 7.2}{90} = 6.99556](https://tex.z-dn.net/?f=%5Cdfrac%7B92%20%5Ctimes%207%20-%202%20%5Ctimes%207.2%7D%7B90%7D%20%3D%206.99556)
cm