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schepotkina [342]
3 years ago
11

Solve for x PLS HURRY

Mathematics
2 answers:
Gelneren [198K]3 years ago
5 0
The answer is B have a good day
QveST [7]3 years ago
5 0
B is the right answer
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A car travels 182 miles in 3 hours and 15 minutes. How many miles does it travel per hour?
timofeeve [1]
57 miles about I'm not positive but I think this is right
6 0
3 years ago
The proprietor of a boutique in New York wanted to determine the average age of his customers. A random sample of 25 customers r
jolli1 [7]

Answer:

28-2.064\frac{10}{\sqrt{25}}=23.872    

28+2.064\frac{10}{\sqrt{25}}=32.128    

So on this case the 95% confidence interval would be given by (23.9;32.1)  

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

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".

\bar X=28 represent the sample mean

\mu population mean (variable of interest)

s=10 represent the sample standard deviation

n=25 represent the sample size  

Solution to the problem

The confidence interval for the mean is given by the following formula:

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}   (1)

In order to calculate the critical value t_{\alpha/2} we need to find first the degrees of freedom, given by:

df=n-1=25-1=24

Since the Confidence is 0.95 or 95%, the value of \alpha=0.05 and \alpha/2 =0.025, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.025,24)".And we see that t_{\alpha/2}=2.064

Now we have everything in order to replace into formula (1):

28-2.064\frac{10}{\sqrt{25}}=23.872    

28+2.064\frac{10}{\sqrt{25}}=32.128    

So on this case the 95% confidence interval would be given by (23.9;32.1)    

7 0
3 years ago
What is the solution to the equation t + 14 = 24? 38 10 14 24
olchik [2.2K]

Answer:

10

Step-by-step explanation:

24-14=10

Do these equations backwards to find the answer you are looking for.

4 0
2 years ago
a punch recipe calls for equal amounts of orange and pineapple juice. pineapple juice comes in 6 ounce cans and orange juice com
sammy [17]

Answer:

0.6 ounces

Step-by-step explanation:

3 0
3 years ago
Write the standard equation for the circle center (–6, 7), r = 9.
Advocard [28]
The standard equation for the circle centre can be written by using this formula: (x-h)² + (y -k)² = r² 

So, the equation in this case is: (x+6)² + (y-7)² = 81
4 0
2 years ago
Read 2 more answers
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