A) y - 8= -2/3 (x + 3)
B) y + 1 = 4 (x - 5)
C) y - 8 = -3/7 (x - 4)
D) y - 7 = 2/3 (x - 5)
E) y + 5 = -5/3 (x + 3)
8/12 is equivalent to 2/3.
Wait do you need help or no
Using addition of variables, it is found that the mean of S is of 73 and the standard deviation is of 8.5.
<h3>What happens to the mean and the standard deviation when two variables are added?</h3>
- The mean is the sum of the means.
- The standard deviation is the square root of the sum of variances.
In this problem, for variables A and B, we have that:
Variable S is the sum of A and B, hence:
The mean of S is of 73 and the standard deviation is of 8.5.
More can be learned about addition of variables at brainly.com/question/26156502
Well she needs to complete 75 laps to complete the race so 75 is the upper limit. She has completed at least 68 laps so the lower limit is 68. so the number of laps she could have completed could be from 68 to 75 so the number of laps (x) can be reprented by this inequallity 68<u /> < x <u><</u> 75