Answer:
315,000
Step-by-step explanation:
(50,000+20,000)+(35,000+20,000)+(40,000+20,000)=185,000
500,000-185,000=315,000
Answer:
$425.50
Step-by-step explanation:
One ring costs $5.75, and he sold 74 of them.
To find the total you would do 5.75 x 74, which is 425.5
Answer:
the answer is 4 hours.
Step-by-step explanation:
x: time clark drove
Y: Mitchells time drove
60 times Y = 75 times x
y=x+1
60(x+1)=75x
60x+60=75x
60=15x (subtract the 60x to the other side)
60/15=4
x=4
Answer:
6.9 is the solution for the system
Answer:
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 and
And for this case we select a sample size of n= 81. Since the distribution for X is normal then we know that the distribution for the sample mean is given by:
And the standard error of the mean would be:
4.1.5
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 and
And for this case we select a sample size of n= 81. Since the distribution for X is normal then we know that the distribution for the sample mean is given by:
And the standard error of the mean would be:
4.1.5