1)12-5x-4kx=y, solve for x
2 answers:
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Answer:
The coordinates of point C are (8,8.5)
Step-by-step explanation:
The picture of the question in the attached figure
Let
----> coordinates of point C
we have that
The horizontal distance AB is equal to
The vertical distance AB is equal to
Find the horizontal coordinate of point C
we know that
so
----> equation A
----> equation B
substitute equation A in equation B
so
The x-coordinate of point C is equal to the x-coordinate of point A plus the horizontal distance between the point A and point C
Find the vertical coordinate of point C
we know that
so
----> equation A
----> equation B
substitute equation A in equation B
so
The y-coordinate of point C is equal to the y-coordinate of point A plus the vertical distance between the point A and point C
therefore
The coordinates of point C are (8,8.5)
Answer:
b. Do not reject H0. We do not have convincing evidence that the mean weekly time spent using the Internet by Canadians is greater than 12.7 hours.
Step-by-step explanation:
Given that in a study of computer use, 1000 randomly selected Canadian Internet users were asked how much time they spend using the Internet in a typical week. The mean of the sample observations was 12.9 hours.
(Right tailed test at 5% level)
Mean difference = 0.2
Std error =
Z statistic = 1.0540
p value = 0.145941
since p >alpha we do not reject H0.
b. Do not reject H0. We do not have convincing evidence that the mean weekly time spent using the Internet by Canadians is greater than 12.7 hours.