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Oksanka [162]
2 years ago
9

What is the value of the function at x = –2? Y= -4 Y= 0 Y=2 Y=3

Mathematics
1 answer:
meriva2 years ago
5 0

Answer:

Y=3

Step-by-step explanation:

You go over to the X axis, find -2 and go up the line vertically until you touch the black line going across. You look to the right and see it says 3. So 3 is your answer

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Barron's reported that the average number of weeks an individual is unemployed is 17.5 weeks. Assume that for the population of
Olin [163]

Answer:

P(16.5

And using the normal standard table or excel we find the probability:

P(-1.768< Z< 1.768) = P(Z

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 avergae number of weeks an individual is unemployed of a population, and for this case we know the distribution for X is given by:

X \sim N(17.5,4)  

Where \mu=17.5 and \sigma=4

Since the distribution for X is normal then, the distribution for the sample mean \bar X is given by:

\bar X \sim N(\mu= 17.5, \frac{\sigma}{\sqrt{n}}= \frac{4}{\sqrt{50}}=0.566)

We select a sample of n =50 people. And we want to find the following probability

P(16.5

And using the normal standard table or excel we find the probability:

P(-1.768< Z< 1.768) = P(Z

4 0
3 years ago
Write three numbers that round to 400
Alex777 [14]
395, 390, 398 those are the numbers
8 0
3 years ago
Remove the parentheses from the expression (–2) – (–3). A. 2 – 3 B. –2 + 3 C. 2 + 3 D. –2 – 3
lukranit [14]

Answer:

B.

Step-by-step explanation:

The negative of a negative is a positive, so B is your choice.  Think of it anothe way, if it helps.  Imagine that the expression is this:

(-2) + (-1)(-3) since every subtraction problem can be rewritten as an addition problem.

We would first, by orders of operation, multiply the -1 and the -3 getting 3.  Then the problem would simplify down to -2 + 3

Just another idea to ponder...

5 0
2 years ago
ALGEBRA 2 100 POINTS
dybincka [34]
  • f(3)=6
  • g(-2)=10
  • \sf f^{-1}(5)=-1
  • \sf g^{-1}(-10)=4

Table attached

4 0
2 years ago
Read 2 more answers
Carpenters refer to the slope of a roof as the pitch of the roof. Find the pitch of the roof.
notsponge [240]

Answer:

12.6 ft (3 s.f.)

Step-by-step explanation:

Please see the attached picture for full solution.

4 0
2 years ago
Read 2 more answers
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