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NNADVOKAT [17]
3 years ago
8

What two numbers multiply to get -60 and add to get 7?

Mathematics
2 answers:
UNO [17]3 years ago
5 0
12 × -5 = 60
12 + (-5) = 12 - 5 = 7
Paha777 [63]3 years ago
5 0
-12 and 5. To work this out, find all the numbers that times togther to make -60. Then see if any of them add together to make 7. The best way to do it is trial and error
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Consider a value to be significantly low if its z score less than or equal to minus−2 or consider a value to be significantly hi
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Answer:

If the weight is higher than 5.8886 gr would be considered significantly high

If the weight is lower than 5.6121 gr would be considered significantly low

Step-by-step explanation:

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".  

Solution to the problem

Let X the random variable that represent the weights of a population, and for this case we know the distribution for X is given by:

X \sim N(5.75241,0.06281)  

Where \mu=5.75241 and \sigma=0.06281

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}

For the case when z =-2 we can do this:

-2 = \frac{X-5.75241}{0.06281}

And if we solve for X we got:

X = 5.75241 -2*0.06281 =5.6121

And for the other case when Z=2 we have:

2 = \frac{X-5.75241}{0.06281}

And if we solve for X we got:

X = 5.75241 +2*0.06281 =5.8886

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If the weight is lower than 5.6121 gr would be considered significantly low

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Which of the following could not be a value of n? side lengths of 9 and 13
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The correct answer here would be D. And that is because, in a triangle, the sum of 2 of the sides has to be greater than the third side for all sides.  If we add 22 and 13 we get 35, and 35 is greater than 9, for sure. But if we add 13 and 9 we get 22 which is not greater than the third side length of 22; it would be collinear with the side length and it has to be greater than the side length.
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