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jok3333 [9.3K]
1 year ago
14

Please answer with everything needed i appreciate everyones help:)

Mathematics
2 answers:
dusya [7]1 year ago
7 0

Answer:

Hey there....

Step-by-step explanation:5

This is ur answer....

<h2>Expression : -x + 5 </h2>

Working :-

<em>x = Unknown number</em>

<em>x + 5 = Sum of the number and Five</em>

<em>x + 5 - 2x = Previous sum decreased by the the twice of the unknown number. </em>

<em>-x + 5 = combine the </em><em>terms</em>

<em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em><em>•</em>

Hope it helps!

Brainliest pls!

Have a good day!^^

77julia77 [94]1 year ago
6 0

Step-by-step explanation:

x is the number.

(x + 5) - 2x : the sum of the number and 5 decreased by twice the number.

or simplified without the brackets

x + 5 - 2x = 5 - x

it is not clear if you need the general expression showing both conditions (the first up there), or the then simplified result

5 - x

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3 years ago
A website manager has noticed that during the evening​ hours, about 5 people per minute check out from their shopping cart and m
Over [174]

Answer:

a) Poisson distribution

b) 99.33% probability that in any one minute at least one purchase is​ made

c) 0.05% probability that seven people make a purchase in the next four ​minutes

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 time interval.

5 people per minute check out from their shopping cart and make an online purchase.

This means that \mu = 5

a) What model might you suggest to model the number of purchases per​ minute? ​

The only information that we have is the mean number of an event(purchases) in a time interval. Each event is also independent fro each other. So you should suggest the Poisson distribution to model the number of purchases per​ minute.

b) What is the probability that in any one minute at least one purchase is​ made? ​

Either no purchases are made, or at least one is. The sum of the probabilities of these events is 1. So

P(X = 0) + P(X \geq 1) = 1

We want to find P(X \geq 1)

So

P(X \geq 1) = 1 - P(X = 0)

In which

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

P(X = 0) = \frac{e^{-5}*(5)^{0}}{(0)!} = 0.0067

1 - 0.0067 = 0.9933.

99.33% probability that in any one minute at least one purchase is​ made

c) What is the probability that seven people make a purchase in the next four ​minutes?

The mean is 5 purchases in a minute. So, for 4 minutes

\mu = 4*5 = 20

We have to find P(X = 7).

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

P(X = 0) = \frac{e^{-20}*(20)^{7}}{(7)!} = 0.0005

0.05% probability that seven people make a purchase in the next four ​minutes

8 0
3 years ago
What is the simplified form of the expression? (m3/4c5) -4
Harlamova29_29 [7]
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3 years ago
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