Answer:

Step-by-step explanation:
The given expression is
.
This expression is the same as;
.
Or
.
We regroup the terms to obtain;

We simplify to get

Using the mean concept, it is found that the mean difference between the call times and the company's average call time is given by:
<h3>What is the mean?</h3>
- The <em>mean </em>of a data-set is given by the <u>sum of all observations in the data-set divided by the number of observations</u>.
In this problem:
- The four observations are the differences between the time of each phone call and the average time.
- They are: {-2.32, -1.55, 4.79, 0.68}
Hence, the mean difference is:

Hence, option C is correct.
To learn more about the mean concept, you can take a look at brainly.com/question/13451786
Distance = 3 units .....................
Answer:
A. 2x + 9 + 11 over x - 2
Step-by-step explanation:
2x^2+5x-7 over x-2
divide - 2x^2 + 5x - 7 over x - 2 = 2x + 9x - 7 over x - 2
= 2x + 9x - 7 over x - 2
divide - 9x - 7 over x - 2 = 9 + 11 over x - 2
= 2x + 9 + 11 over x - 2
Answer:
Answer: Proved: the difference between squares of consecutive even numbers is always a multiple of 4. ... From the results above, we can see that 12, 20, and 28 are multiples of 4. Therefore, the difference between squares of consecutive even numbers is always a multiple of 4.
Step-by-step explanation: