Just divide 50 by 12
4 1/6
Answer:
2+5a+5a and 9a+a+2
Step-by-step explanation:
It is the answer as
6a-4a+2= 2a+2
2+5a+5a= 10a+2
& 9a+a+2= 10a+2
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Answer:
Step-by-step explanation:
(3x -2) - (4x +1)
= 3x - 2 - 4x - 1
= - x - 3
Answer:
a) 
And replacing we got:

b) 
And replacing we got:

c) 
And replacing we got:

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".
Part a
Let X the random variable of interest for this case. We define the z score with the following formula:
And for this case we know that 
If we solve for x from the z score formula we got:

And replacing we got:

Part b
Let X the random variable of interest for this case. We define the z score with the following formula:
And for this case we know that 
If we solve for x from the z score formula we got:

And replacing we got:

Part c
Let X the random variable of interest for this case. We define the z score with the following formula:
And for this case we know that 
If we solve for x from the z score formula we got:

And replacing we got:
