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3 years ago

I really need this it's a test

Mathematics

1 answer:

faltersainse [42]3 years ago

8 0

Move all terms not containing x to the right side of the equation

x=9

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Based on the attendance at past picnics, Luis expects 95% of the students in his class to attend this years picnic. If 120 stude

Sever21 [200]

Answer:

95 / 100 * 120 = 114 students

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3 years ago

An ice cream shop offers 3 ice cream flavors 3 types of syrup and 2 toppings for sundaes

babymother [125]

Answer: 18

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4 years ago

A travelling salesman sells milkshake mixing machines and on average sells 8.9 machines per month. He needs to sell at least 3 m

Goshia [24]

Answer:

0.67% probability he will have to shut down after this month

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.

On average sells 8.9 machines per month.

So $\mu = 8.9$

Using the Poisson distribution, what is the probability he will have to shut down after this month

If he sells less than 3 machines.

$P(X < 3) = P(X = 0) + P(X = 1) + P(X = 2)$

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

$P(X = 0) = \frac{e^{-8.9}*8.9^{0}}{(0)!} = 0.0001$

$P(X = 1) = \frac{e^{-8.9}*8.9^{1}}{(1)!} = 0.0012$

$P(X = 2) = \frac{e^{-8.9}*8.9^{2}}{(2)!} = 0.0054$

$P(X < 3) = P(X = 0) + P(X = 1) + P(X = 2) = 0.0001 + 0.0012 + 0.0054 = 0.0067$

0.67% probability he will have to shut down after this month

5 0

3 years ago

What is the result of adding these two equations?<br> −5x−9y=3<br> 5x−9y=−2<br>

dlinn [17]

Answer:

-18y = 1

Step-by-step explanation:

4 0

3 years ago

Pls can someone help me with this, and please explain why?

kolezko [41]

C is the correct answer. It can’t be D because negative can’t be under radical.

Hope this helps!

5 0

3 years ago

Read 2 more answers