Answer:
24°
Step-by-step explanation:
(4y-4)+(180-52)+3y = 180°
4y-4+128+3y = 180
7y+124 = 180
7y = 56
y = 8
SO ∠x = 3y
∠x = 3(8)
∠x = 24
It depends what the variable m is.
Answer:
10 times
Step-by-step explanation:
2.50 x 10 = 25
15 + (1 x 10) = 25
Answer:
The co variance of the midterm and final exam scores is 58.76.
Step-by-step explanation:
The formula to compute the sample co variance is:
![Cov(x,y)=\frac{\sum(X-Mean\ of\ X)(Y-Mean\ of\ Y)}{n-1}](https://tex.z-dn.net/?f=Cov%28x%2Cy%29%3D%5Cfrac%7B%5Csum%28X-Mean%5C%20of%5C%20X%29%28Y-Mean%5C%20of%5C%20Y%29%7D%7Bn-1%7D)
The values are computed in the table below.
Compute the co variance as follows:
![Cov(x,y)=\frac{\sum(X-Mean\ of\ X)(Y-Mean\ of\ Y)}{n-1}\\=\frac{646.33}{12-1}\\ =58.76](https://tex.z-dn.net/?f=Cov%28x%2Cy%29%3D%5Cfrac%7B%5Csum%28X-Mean%5C%20of%5C%20X%29%28Y-Mean%5C%20of%5C%20Y%29%7D%7Bn-1%7D%5C%5C%3D%5Cfrac%7B646.33%7D%7B12-1%7D%5C%5C%20%3D58.76)
Thus, the co variance of the midterm and final exam scores is 58.76.