Answer:
![Conf= 0.80](https://tex.z-dn.net/?f=%20Conf%3D%200.80)
With the confidence level we can find the significance level:
![\alpha =1-0.8=0.2](https://tex.z-dn.net/?f=%5Calpha%20%3D1-0.8%3D0.2)
And the value for
. Then we can use the normal standard distribution and we can find a quantile who accumulates 0.1 of the area on each tail and we got:
![z_{\alpha/2}= \pm 1.28](https://tex.z-dn.net/?f=%20z_%7B%5Calpha%2F2%7D%3D%20%5Cpm%201.28)
Step-by-step explanation:
For this problem we have the confidence level given
![Conf= 0.80](https://tex.z-dn.net/?f=%20Conf%3D%200.80)
With the confidence level we can find the significance level:
![\alpha =1-0.8=0.2](https://tex.z-dn.net/?f=%5Calpha%20%3D1-0.8%3D0.2)
And the value for
. Then we can use the normal standard distribution and we can find a quantile who accumulates 0.1 of the area on each tail and we got:
![z_{\alpha/2}= \pm 1.28](https://tex.z-dn.net/?f=%20z_%7B%5Calpha%2F2%7D%3D%20%5Cpm%201.28)
To solve this, you would times 0.23 and 554. Therefore, the answer is 127.42
The answer is 6x-7y=21
In order to find this answer you need to convert the answer choices into y intercept form by isolating the y variable to one side of the equation.
6x-7y=21
-7y=-6x+21
y=6/7x-3
As you can see when you change the form of this equation, the y intercept is -3.