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svet-max [94.6K]
2 years ago
8

b) x 2 + x -2 Find the zeroes of the quadratic polynomial and verify the relationship between the zeroes and the coefficients;

Mathematics
1 answer:
natulia [17]2 years ago
3 0
Well ...I don't understand that but here's something that would help me calm down

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What is 1812 divided by 4
andrezito [222]
1812/4=
453
The answer is 453
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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
2 years ago
Kenyan bought 3.4 pounds of nails for his construction job. Each pound cost $1.59. How much did he pay for the nails? Round to t
o-na [289]
3.4/1.59= 2.138364779874214
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3 years ago
A package of pairs of insulated costs ​$. What is the unit price of the pairs of
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$35.34   6 pairs

$35.34/6=$5.89 per pair

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2 years ago
A radioactive substance decays exponentially. A scientist begins with 100 milligrams of a radioactive substance. After 27 hours,
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33.3 because 27/50=36/x and x=66.67 and thats how much as decayed after 36 hours but you want what is left so subtract from 100 and get 33.3
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3 years ago
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