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autumnguidry7628
07.10.2020 •
Mathematics
PLEASE HELP!
solve for x and then find measure for angle b
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Ответ:
Explanation:
Angles A and B are alternate exterior angles.
Due to the parallel lines, alternate exterior angles are congruent
A = B
5x-15 = 2x+21
5x-2x = 21+15
3x = 36
x = 36/3
x = 12
Use this x value to find the measure of angle B
angle B = 2x+21
angle B = 2*12+21
angle B = 24+21
angle B = 45 degrees
As a check,
angle A = 5x-15
angle A = 5*12+15
angle A = 60-15
angle A = 45 degrees
Since A and B are both 45 degrees, this confirms the correct x value
Ответ:
Null hypothesis:![\mu_1 = \mu_2 = ..... \mu_j , j =1,2,....,n](/tpl/images/0661/2692/56288.png)
Alternative hypothesis:![\mu_i \neq \mu_j , i,j =1,2,....,n](/tpl/images/0661/2692/bc508.png)
The alternative hypothesis for this case is that at least one mean is different from the others.
And the best method for this case is an ANOVA test.
Step-by-step explanation:
For this case we wnat to test if all the mean length of all face-to-face meetings and the mean length of all Zoom meetings are the same. So then the system of hypothesis are:
Null hypothesis:![\mu_1 = \mu_2 = ..... \mu_j , j =1,2,....,n](/tpl/images/0661/2692/56288.png)
Alternative hypothesis:![\mu_i \neq \mu_j , i,j =1,2,....,n](/tpl/images/0661/2692/bc508.png)
The alternative hypothesis for this case is that at least one mean is different from the others.
And the best method for this case is an ANOVA test.