1/2n + 15 = 9 <== ur equation
1/2n = 9 - 15
1/2n = - 6
n = -6 * 2
n = - 12 <== ur solution
Answer:
The best estimate of the number of times out of 39 that Ariana is on time to class is 27.
Step-by-step explanation:
For each class, there are only two possible outcomes. Either Ariana is on time, or she is not. The probability of Ariana being on time for a class is independent of other classes. So we use the binomial probability distribution to solve this question.
Binomial probability distribution
Probability of exactly x sucesses on n repeated trials, with p probability.
The expected value of the binomial distribution is:
![E(X) = np](https://tex.z-dn.net/?f=E%28X%29%20%3D%20np)
The probability that Ariana is on time for a given class is 69 percent.
This means that ![p = 0.69](https://tex.z-dn.net/?f=p%20%3D%200.69)
If there are 39 classes during the semester, what is the best estimate of the number of times out of 39 that Ariana is on time to class
This is E(X) when n = 39. So
![E(X) = np = 39*0.69 = 26.91](https://tex.z-dn.net/?f=E%28X%29%20%3D%20np%20%3D%2039%2A0.69%20%3D%2026.91)
Rounding
The best estimate of the number of times out of 39 that Ariana is on time to class is 27.
Answer: <em>Lyndon Johnson convinced Congress that passing Kennedy's political agenda of civil rights legislation would honor his death</em>
Step-by-step explanation: <em>The statement that highlights the greatest impact John F. Kennedy's assassination had on the US is that Lyndon Johnson convinced Congress that passing Kennedy's political agenda of civil rights legislation would honor his death. The John F. Kennedy's assassination was an event that had a massive impact on politician and citizen alike, who were deeply sorry for the death of a person that was so loved by Americans.</em>
Answer: The answer is D 12 i am pretty sure.
Step-by-step explanation: