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White raven [17]
3 years ago
10

What does 1 + 9x equal?

Mathematics
1 answer:
iragen [17]3 years ago
7 0

Answer:

9x+1

Step-by-step explanation:

Let's simplify step-by-step.

1+9x

Answer:

=9x+1

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The amount of time a passenger waits at an airport check-in counter is random variable with mean 10 minutes and standard deviati
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Answer:

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= 0.5

(b) between 5 and 10 minutes

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Step-by-step explanation:

We solve the above question using z score formula. We given a random number of samples, z score formula :

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Standard error : σ/√n

σ is the population standard deviation

n = number of samples

(a) less than 10 minutes

x = 10 μ = 10, σ = 2 n = 50

z = 10 - 10/2/√50

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z = 0

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= 0.5

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(b) between 5 and 10 minutes

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x = 5 μ = 10, σ = 2 n = 50

z = 5 - 10/2/√50

z = -5 / 0.2828427125

= -17.67767

P-value from Z-Table:

P(x<5) = 0

Using the z table to find the probability

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x = 10 μ = 10, σ = 2 n = 50

z = 10 - 10/2/√50

z = 0 / 0.2828427125

z = 0

Using the z table to find the probability

P(z ≤ 0) = P(z < 0) = P(x = 10)

= 0.5

Hence, the probability that the average waiting time waiting in line for this sample is between 5 and 10 minutes is

P(x = 10) - P(x = 5)

= 0.5 - 0

= 0.5

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