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mamaluj [8]
2 years ago
6

Rewrite the following 7(3+5=___+___​

Mathematics
1 answer:
Ray Of Light [21]2 years ago
6 0

Answer:

21+35

Step-by-step explanation:

use distributive property, multiply 7 by the two numbers in the parenthesis

keep the problem though.

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Researchers at a pharmaceutical company have found that the effective time duration of a safe dosage of pain relief drug is norm
FrozenT [24]

Answer:

a) P(1

b) P(X

Step-by-step explanation:

1) Previous concepts

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".  

2) Part a

Let X the random variable that represent the duration of a safe dosage of pain relief drug, and for this case we know the distribution for X is given by:

X \sim N(1.5,0.8)  

Where \mu=1.5 and \sigma=0.8

We are interested on this probability

P(1

And the best way to solve this problem is using the normal standard distribution and the z score given by:

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

If we apply this formula to our probability we got this:

P(1

And we can find this probability on this way:

P(-0.625

And in order to find these probabilities we can find tables for the normal standard distribution, excel or a calculator.  

P(-0.625

3) Part b

We are interested on this probability

P(X

And the best way to solve this problem is using the normal standard distribution and the z score given by:

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

If we apply this formula to our probability we got this:

P(X

And we can find this probability on this way:

P(z

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3 years ago
on a 100 pt math quiz 36 points can be earned by correctly completing division problems. how many points can be earned by comple
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Adding and subtracting polynomials<br><br>(-3x² - 9x + 5) - ( -2x²- 4x + 7)​
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Answer:

(-3x²- 9x+5) - (-2x²-4x +7)

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=-3x²+2x²-9x+4x+5-7

=-x²-5x-2

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Someone please help. Which ordered pairs lie on the line shown in the graph?
Lady_Fox [76]
The first box is the answer to your question.
8 0
3 years ago
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