Answer:
Where 
the mean and 
the deviation
Since the distribution for X is normal then we can conclude that the distribution for the sample mean 
is given by:
Step-by-step explanation:
Previous concepts
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".
Solution to the problem
Let X the random variable that represent the variable of interest of a population, and for this case we know the distribution for X is given by:
Where the mean and the deviation
Since the distribution for X is normal then we can conclude that the distribution for the sample mean is given by:
Answer:
x = -47/6
y=-47
Step-by-step explanation:
Answer:
17
125
Step-by-step explanation:
exterior angle is equal to sum of interior opposite angle. so
( 2x + 6 ) + ( 5x ) = ( 8x - 11 )
7x + 6 = 8x - 11
x = 17
exterior angle = ( 8 * 17 ) - 11 = 125
Answer:
C) Maria bought a magazine for $8 and 2 notebooks. She spent a total of $15. What was the cost of each notebook?
Step-by-step explanation:
The equation has twice an unknown value added to 8 with the result being 15.
<em>Here are how the answer choices compare to the equation:</em>
A) only one magazine of unknown cost is involved, not two. There is not enough information to answer this question with any equation.
B) three unknowns are involved and the question asks for the difference of their sum and 15. There is not enough information to answer this question with any equation.
C) if x represents the cost of the notebook, the equation is appropropriate to finding its cost, as asked by the question. This is the best choice.
D) only one unknown. The question makes no sense, as she bought items worth more than the amount paid.
The answer is B. 18 and 19. I hope this helps!
