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3 years ago

HELPPP MEEEEEEEEEEEEEEEEEEEEEEE

Mathematics

1 answer:

vekshin13 years ago

8 0

The third one hope that helps

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Write 3 additions 3 multiplications 2 division equato that equals the number 42830

alex41 [277]

Answer:

28,550.33333

Step-by-step explanation:

28,550.33333 + 3 = 28,553.33333

28,553.33333 x 3 = 85,659.99999

85,659.99999 ÷ 2 = 42830

6 0

3 years ago

If electricity power failures occur according to a Poisson distribution with an average of 3 failures every twenty weeks, calcul

Wittaler [7]

Answer:

0.9898 = 98.98% probability that there will not be more than one failure during a particular week.

Step-by-step explanation:

In a Poisson distribution, the probability that X represents the number of successes of a random variable is given by the following formula:

$P(X = x) = \frac{e^{-\mu}*\mu^{x}}{(x)!}$

In which

x is the number of sucesses

e = 2.71828 is the Euler number

$\mu$ is the mean in the given interval.

3 failures every twenty weeks

This means that for 1 week, $\mu = \frac{3}{20} = 0.15$

Calculate the probability that there will not be more than one failure during a particular week.

Probability of at most one failure, so:

$P(X \leq 1) = P(X = 0) + P(X = 1)$

Then

$P(X = x) = \frac{e^{-\mu}*\mu^{x}}{(x)!}$

$P(X = 0) = \frac{e^{-0.15}*0.15^{0}}{(0)!} = 0.8607$

$P(X = 1) = \frac{e^{-0.15}*0.15^{1}}{(1)!} = 0.1291$

Then

$P(X \leq 1) = P(X = 0) + P(X = 1) = 0.8607 + 0.1291 = 0.9898$

0.9898 = 98.98% probability that there will not be more than one failure during a particular week.

6 0

3 years ago

What is the x value such that y= 15-3x and y=0?

enot [183]

Answer:

Step-by-step explanation:

y = 15 - 3x

0 = 15 - 3x

15 - 0 = 3x

x = 5

7 0

3 years ago

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Can somebody help me alive this?

Sveta_85 [38]

Answer:6/4

Step-by-step explanation:

7 0

3 years ago

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for 9x + 25= 88, deena wrote the situation "i bought some shirts at the store for 9$ each and received a 25$ discount. my total

MrRissso [65]

Deena has included the discount on the wrong side of the equation.

3 0

3 years ago