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3 years ago

What is the result of subtracting the second equation from the first? -2x+7y=10 3x+7y=2

Mathematics

1 answer:

Stella [2.4K]3 years ago

3 0

Answer:

Step-by-step explanation:

propagate the negative through the second equation and subtract

-5x = 8

x = -8/5

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What is 6x1(3+1)? I am just wondering what the answer and break down will be.

natulia [17]

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Store A uses the newsvendor model to manage its inventory. Demand for its product is normally distributed with a mean of 500 and

ra1l [238]

Answer:

$P(X$

Step-by-step explanation:

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Let X the random variable that represent the Demand for its product on this case, and for this case we know the distribution for X is given by:

$X \sim N(\mu=500,\sigma=300)$

And let $\bar X$ represent the sample mean, the distribution for the sample mean is given by:

$\bar X \sim N(\mu,\frac{\sigma}{\sqrt{n}})$

What is its in-stock probability if Store A’s order quantity is 800 units?

We are looking for this probability:

What is its in-stock probability if Store A’s order quantity is 800 units?

So we can find the following values:

$P(X>800)$ and $P(X$

Sor this problem we can use the z score formula given by:

$z=\frac{x-\mu}{\sigma}$

If we find the z score for the value 800 we got:

$z=\frac{800-500}{300}=1$

And if we find:

$P(X$

And by the complement rule:

$P(X>800)=1-P(X$

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3 years ago

find the twelfth term of the arithmetic sequence whose ninth term is 50 and whose sixteenth term is 85

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3 years ago

If x/9 < 2/5 and x is a positive integer, how many distinct values are possible for x?

SVEN [57.7K]

Answer:

Step-by-step explanation:

Solving the inequality gives ...

x/9 < 2/5

x < 18/5 . . . . multiply by 9

Applying the problem restrictions, we have ...

0 < x < 3.6 . . . . . x is an integer

Solutions are {1, 2, 3}. There are 3 distinct possible values for x.

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4 years ago

To multiply a decimal number by 10, _____.

natali 33 [55]

Move the decimal place one point to the right

Example 3.75 x 10 = 37.5

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