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3 years ago

What's happening to this graph when the X values are between 4 and 8?

Mathematics

2 answers:

Korolek [52]3 years ago

5 0

Hello!

On the graph, when the X values are between 4 and 8, they are being constant. The X values between 4 and 8 are constant because the line shown between 4 and 8 on the graph show the line as a straight line. It is not going up nor is it going down, so you can conclude that the X values are not increasing or decreasing.

I hope this helps!

skelet666 [1.2K]3 years ago

3 0

It's constant when it is greater than or equal 2
Answer

when the X values are between 4 and 8, it's constant.
when x = 4, y = -2
when x = 5, y = -2
when x = 6, y = -2...and so on....

So when x is greater than or equal 2, y is still constant at -2
A is the correct answer.

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Let x denote the lifetime of a mcchine component with an exponential distribution. The mean time for the component failure is 25

aliina [53]

Answer:

0.1353 = 13.53% probability that the lifetime exceeds the mean time by more than 1 standard deviations

Step-by-step explanation:

Exponential distribution:

The exponential probability distribution, with mean m, is described by the following equation:

$f(x) = \mu e^{-\mu x}$

In which $\mu = \frac{1}{m}$ is the decay parameter.

The probability that x is lower or equal to a is given by:

$P(X \leq x) = \int\limits^a_0 {f(x)} \, dx$

Which has the following solution:

$P(X \leq x) = 1 - e^{-\mu x}$

The probability of finding a value higher than x is:

$P(X > x) = 1 - P(X \leq x) = 1 - (1 - e^{-\mu x}) = e^{-\mu x}$

The mean time for the component failure is 2500 hours.

This means that $m = \frac{2500}, \mu = \frac{1}{2500} = 0.0004$

What is the probability that the lifetime exceeds the mean time by more than 1 standard deviations?

The standard deviation of the exponential distribution is the same as the mean, so this is P(X > 5000).

$P(X > x) = e^{-0.0004*5000} = 0.1353$

0.1353 = 13.53% probability that the lifetime exceeds the mean time by more than 1 standard deviations

4 0

2 years ago

Will mark bianleast plz plz i really need this

trasher [3.6K]

Answer:

2 6 6

Step-by-step explanation:

connect them and look at their angels ad look at the number close to it and u will get it

3 0

2 years ago

Read 2 more answers

HELP ME WITH MATH!!! So basically I have to figure out how many hours that is between the times.

Ad libitum [116K]

Answer: (I think its correct)

1: 8 hours and 30 minutes

2: 8 hours

3: 8 hours and 50 minutes

4: 8 hours and 45 minutes

5: 7 hours and 48 minutes

6: 11 hours 13 minutes

7: 11 hours 31 minute

Step-by-step explanation: (Im bad at explaining it)

So I got this by using counting the hours in between the times and taking out the minutes in them,then subtracting the time they took the fall asleep. Every time that has minutes I add that, if it is over 60 minutes I subtract 60 minutes. So like 30+35=65 | 65-60=5.

Lets do a problem: 9:15 (bed) | 10:30(woke up) | 30 minutes (fall asleep)

So we count how many hours in each time and we take out the minutes, so 9:00, 10:00, 11:00, so on and so forth.

So in between the hours its was 13. Then we add the minutes (15+30)

15+30=45. So the answer is 13 hours and 45 minutes, but we got to subtract 13 hours and 45 minutes which is 13 hours and 15 minutes.

Final Answer: 13 hours and 15 minutes.

8 0

2 years ago

Read 2 more answers

Solve the equation for all values of x by completing the square. x^2+8x=9

SpyIntel [72]

$(*)\qquad(a+b)^2=a^2+2ab+b^2\\\\x^2+8x=9\\\\x^2+2\cdot x\cdot4=9\ \ \ \ |+4^2\\\\\underbrace{x^2+2\cdot x\cdot4+4^2}_{(*)}=9+4^2\\\\(x+4)^2=25\to x+4=\pm\sqrt{25}\\\\x+4=-5\ \vee\ x+4=5\ \ \ \ \ |-4\\\\x=-9\ \vee\ x=1$

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3 years ago

-58= -2(5n + 4) Explain your solution process

steposvetlana [31]

$\text{Hello there!}\\\\\text{Solve for n:}\\\\-58= -2(5n + 4)\\\\\text{Distribute the-2 to the numbers in the parenthesis}\\\\-58= -10n -8\\\\\text{Add 8 to both sides}\\\\-50=-10n\\\\\text{Divide both sides by -10}\\\\\large\boxed{5=n}$

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3 years ago