Answer:
x=4, y=9
Step-by-step explanation:
Solve with substitution.
Answer: The variance of the data is 0.25, therefore second option is correct.
Explanation:
From the given graph it is noticed that the graph is symmetric along x = 4 or it is a bell shaped graph. So, the data follows the normal distribution.
The graph of normal distribution is bell shaped graph symmetric along the mean. The graph of normal distribution is shown below.
Since the given graph is symmetric along x = 4 therefore the mean of the data is 4.
Let the variance be
. So, the given data follows normal distribution with mean 4 and variance
.
In the below graph the point immediate left to the mean is
and in the given graph it 3.5
![\mu-\sigma=3.5](https://tex.z-dn.net/?f=%5Cmu-%5Csigma%3D3.5)
![4-\sigma=3.5](https://tex.z-dn.net/?f=4-%5Csigma%3D3.5)
![\sigma=0.5](https://tex.z-dn.net/?f=%5Csigma%3D0.5)
![\sigma^2=0.25](https://tex.z-dn.net/?f=%5Csigma%5E2%3D0.25)
Therefore, the variance of the data is 0.25, therefore second option is correct.
suppelementary angles are angles that add to 180
remember that a straight line is 180 degrees so some angles that are supplementary are 1 and 2, 5 and 6, 1 and 5, 6 and 2, 3 and 7, 4 and 8, 7 and 8, 3 and 4
vertical angles are across from each other when 2 lines cross, they are like 5 and 2, 6 and 1, 7 and 4, 8 and 3
Add 10 + 20 = 30 apples in total