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blsea [12.9K]
2 years ago
7

HELP ASAP PLEASE!!

Mathematics
1 answer:
Korolek [52]2 years ago
3 0

Answer:

you can check on a website called "desmos graphing."

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Suppose that the probabilities are 0.4, 0.3, 0.2, and 0.1, respectively, that 0, 1, 2, or 3 power failures will strike a certain
defon

Answer:

mean = 1 power failure

variance = 1 (power failure)²

Step-by-step explanation:

Since the mean is computed as

mean = E(x) = ∑ x * p(x) for all x

then for the random variable x=power failures , we have

mean = ∑ x * p(x) = 0 * 0.4 + 1* 0.3 + 2*0.2 + 3* 0.1 = 1 power failure

since the variance can be calculated through

variance =  ∑[x-E(x)]² * p(x) for all x

but easily in this way

variance = E(x²) -  [E(x)]² , then

E(x²) = ∑ x² * p(x) = 0² * 0.4 + 1²* 0.3 + 2²*0.2 + 3²* 0.1 = 2 power failure²

then

variance = 2 power failure² - (1 power failure)² = 1 power failure²

therefore

mean = 1 power failure

variance = 1 power failure²

7 0
3 years ago
Help please please help me please help
konstantin123 [22]

Answer:

<em>1) a=3</em>

<em>2) x=2</em>

<em>3) b=3</em>

<em>4) x=5</em>

<em>5) b=2</em>

<em>6) a=4</em>

Hope this helps :)

<em>-ilovejiminssi♡</em>

5 0
3 years ago
Read 2 more answers
Can the average rate of change of a function be constant ? Explain
Marianna [84]

Answer:

  yes

Step-by-step explanation:

The average rate of change of any linear function is a constant. That fact is what makes it a linear function.

8 0
3 years ago
Please! I need help ASAP!
leonid [27]
Photomath might work
5 0
2 years ago
Read 2 more answers
Will mark brainliest im in a rush so please help me if you can
Afina-wow [57]

Answer:

B!

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
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