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3 years ago

Please answer these 2 questions

Mathematics

1 answer:

Mamont248 [21]3 years ago

3 0

Answer:

FINE ITS A AND B

Step-by-step explanation:

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aivan3 [116]

If the lines are parallel, the have to have the same slope

so if the red line has a slope of 2/5, the green line will have a slope of 2/5

Answer: 2/5

Choice B

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3 years ago

Simplify the expression:<br><br> 7(d - 1) + 2

Alinara [238K]

Answer: 7d-5

I hope it helps you!!!!!

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3 years ago

Distance between -18 and -4

JulijaS [17]

Hey there! I'm happy to help!

To find the distance between two numbers, you simply subtract them!

-18--4

-18+4 (two negatives makes a positive)

-14.

Have a wonderful day! :D

4 0

3 years ago

Customers arrivals at a checkout counter in a department store per hour have a Poisson distribution with parameter λ = 7. Calcul

IgorLugansk [536]

Answer:

(1)14.9% (2) 2.96% (3) 97.04%

Step-by-step explanation:

Formula for Poisson distribution: $P(k) = \frac{\lambda^ke^{-k}}{k!}$ where k is a number of guests coming in at a particular hour period.

(1) We can substitute k = 7 and $\lambda = 7$ into the formula:

$P(k=7) = \frac{7^7e^{-7}}{7!}$

$P(k=7) = \frac{823543*0.000911882}{5040} = 0.149 = 14.9\%$

(2)To calculate the probability of maximum 2 customers, we can add up the probability of 0, 1, and 2 customers coming in at a random hours

$P(k\leq2) = P(k=0)+P(k=1)+P(k=2)$

$P(k\leq2) = \frac{7^0e^{-7}}{0!} + \frac{7^1e^{-7}}{1!} + \frac{7^2e^{-7}}{2!}$

$P(k \leq 2) = \frac{0.000911882}{1} + \frac{7*0.000911882}{1} + \frac{49*0.000911882}{2}$

$P(k\leq2) = 0.000911882+0.006383174+0.022341108 \approx 0.0296=2.96\%$

(3) The probability of having at least 3 customers arriving at a random hour would be the probability of having more than 2 customers, which is the invert of probability of having no more than 2 customers. Therefore:

$P(k\geq 3) = P(k>2) = 1 - P(k\leq2) = 1 - 0.0296 = 0.9704 = 97.04\%$

4 0

2 years ago

Which style do you like best out of the two choices<br><br> And yes that is not me obviously

Oksi-84 [34.3K]

Answer:

tbh i like the first one its so simple but like so nice at the same time

4 0

3 years ago

Read 2 more answers