Answer:
XY= 12
Step-by-step explanation:
Please see attached picture for full solution.
Answer:
The 3rd one.
Step-by-step explanation:
Using the normal distribution, it is found that a student has to score 1.08 standard deviations above the mean to be publicly recognized.
<h3>Normal Probability Distribution</h3>
In a normal distribution with mean
standard deviation
z-score of a measure X is given by:

- It measures how many standard deviations the measure is from the mean.
- After finding the z-score, we look at the z-score table and find the p-value associated with this z-score, which is the percentile of X.
The top 14% of the scores are given by scores above the 86th percentile, which corresponds to Z = 1.08, hence, a student has to score 1.08 standard deviations above the mean to be publicly recognized.
More can be learned about the normal distribution at brainly.com/question/24663213
Answer:
(5 1/3)/7
Step-by-step explanation:
Divide 4 by 3, then times it by four and put it over the 7
X + (X+1)+ (x+2)=-342
3x+3 =-342
3X=-339
X=-113, -114, -115