Answer:

Step-by-step explanation:
Let the missing integer be x
Solve for x

Move 3 to right hand side and change it's sign

The negative and positive integers are always subtracted but posses the sign of the bigger integer

Change the signs of both sides

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Correct option is:
B. 2
<h2>
Explanation:</h2>
From the double number line shown we can set:

So we can solve this problem by using either equation (3) or (4). So, choosing equation (3):

<h2>Learn more:</h2>
Solving equations: brainly.com/question/7747308
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Using the z-distribution, as we have the standard deviation for the population, it is found that the smallest sample size required to obtain the desired margin of error is of 77.
<h3>What is a z-distribution confidence interval?</h3>
The confidence interval is:

In which:
is the sample mean.
is the standard deviation for the population.
The margin of error is given by:

In this problem, we have that the parameters are given as follows:
.
Hence, solving for n, we find the sample size.






Rounding up, the smallest sample size required to obtain the desired margin of error is of 77.
More can be learned about the z-distribution at brainly.com/question/25890103
Here a "success" is "obtaining a 7 or a 5." Assuming that the 10-sided die is marked {1, 2, 3, ... , 9, 10}, there are 2 ways in which to get a "success" out of 10 possible outcomes. Thus, P(5 or 7) is 2/10, or 1/5, or 02.