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xxTIMURxx [149]
3 years ago
5

Help asap pls and ty

Mathematics
2 answers:
BabaBlast [244]3 years ago
7 0
The answer I got is (-6,-2) the x value is -6
mafiozo [28]3 years ago
6 0
Give them brainliest plz! They got it right
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Vail Resorts pays part-time seasonal employees at ski resorts on an hourly basis. At a certain mountain, the hourly rates have a
notsponge [240]

Answer:

z=0.842

And if we solve for a we got

\mu=13.16 +0.842*3=15.69

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 hourly rates of a population, and for this case we know the distribution for X is given by:

X \sim N(\mu,3)  

For this part we want to find a value a, such that we satisfy this condition:

P(X>13.16)=0.20   (a)

P(X   (b)

Both conditions are equivalent on this case. We can use the z score again in order to find the value a.  

As we can see on the figure attached the z value that satisfy the condition with 0.80 of the area on the left and 0.20 of the area on the right it's z=0.842. On this case P(Z<0.842)=0.8 and P(z>0.842)=0.20

If we use condition (b) from previous we have this:

P(X  

P(z

But we know which value of z satisfy the previous equation so then we can do this:

z=0.842

And if we solve for a we got

\mu=13.16 +0.842*3=15.69

3 0
2 years ago
25 10^6 in standard form
Alex

Answer:

0^6= 1000000. The final answer is 25000000.

6 0
3 years ago
Prove x²+y² = (x+y) (x-y)​
gtnhenbr [62]

Answer:

(x+y)(x-y)

x^2 - xy + xy - y^2

x^2 - y^2

7 0
2 years ago
1 $40.00 shirt is on a 10% off sale rack, What is the final price of the shirt 8.25%
erastova [34]
Answer: 38.97

10% of 40 is 4
40-4=36
8.25% of 36 is 2.97
36+2.97= 38.97
3 0
2 years ago
Read 2 more answers
What are the solutions of x3&gt;−1 ? Graph the solutions.
Ksivusya [100]
X>-1/3, the graph would be filled everything to the right of -1/3 on the x axis
5 0
3 years ago
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