Answer: B. -4 5/12
Step-by-step explanation:
Using addition of variables, it is found that the mean of S is of 73 and the standard deviation is of 8.5.
<h3>What happens to the mean and the standard deviation when two variables are added?</h3>
- The mean is the sum of the means.
- The standard deviation is the square root of the sum of variances.
In this problem, for variables A and B, we have that:
Variable S is the sum of A and B, hence:
The mean of S is of 73 and the standard deviation is of 8.5.
More can be learned about addition of variables at brainly.com/question/26156502
Answer:
y=-14acfr+5x
Step-by-step explanation:
hope it helps
Answer:
2 hours
Step-by-step explanation:
Given
Required
Determine the hours when the charges are the same
To do this, we simply equate both expressions:
Collect Like Terms
Divide both sides by -22
Brand a: per fork is 0.06 cents.
Brand b: per fork is 0.05
Choose brand B!