<h3>
Answer: 1.21</h3>
Work Shown:
z = (x - mu)/sigma
z = (72.4 - 69.0)/(2.8)
z = (3.4)/(2.8)
z = 1.2142857 .... which is approximate
z = 1.21
Given:
The mean number of emails adele received during a week was 51.
The numbers received for the six days were 39, 57, 70, 45, 71, 32.
To find:
The number of emails received on the seventh day.
Solution:
Let x be the number of emails received on the seventh day.
We know that,


Multiply both sides by 7.

Subtract 314 from both sides.


Therefore, she received 43 emails on the seventh day.
Answer:
Dionostics sucks. Just did one. The answer to that is the top one with the scalenes.
Step-by-step explanation:
Answer:
A
Step-by-step explanation:
Use the equation and plug in each of the x values to check if the y's will be the same and for the y-intercept(-6), you could see that when x was 0, y was at negative 6.
Answer:80
Step-by-step explanation: