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klasskru [66]
3 years ago
8

Which measurement is the more precise measurement:

Mathematics
2 answers:
VashaNatasha [74]3 years ago
3 0

Answer: a correct me if I’m wrong

Step-by-step explanation:

kozerog [31]3 years ago
3 0

Answer:

B trust me

Step-by-step explanation:

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Answer E is the only one that is close

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2 years ago
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What number must you add to the expression below to complete the square? x^2-20x?
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We have that
x²<span>-20x
</span><span>Group terms that contain the same variable
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3 years ago
A random sample has been taken from a normal distribution and the following confidence intervals constructed using the same data
LuckyWell [14K]

Answer:

(25.53, 37.87): 95% CI

(23.59, 39.81): 99% CI

Step-by-step explanation:

The margin of error of a confidence interval is given by:

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

z is related to the confidence level. The higher the confidence level, the higher the values of z, and thus, we wider the confidence interval is.

In this question:

The narrower C.I. is the 95%, and the wider is the 99%. So

(25.53, 37.87): 95% CI

(23.59, 39.81): 99% CI

4 0
3 years ago
Qual a raiz da equação X²+5X-14=0 ?
ElenaW [278]

Answer:

e) Hence 2, -7 are roots of the equation X² + 5X - 14 = 0

Step-by-step explanation:

given equation : X² + 5X - 14 = 0

⇒ X² + 7X - 2X - 14 = 0

⇒ X·(X + 7) - 2·(X + 7) = 0

⇒ (X + 7)·(X - 2) = 0

⇒ X = -7, X = 2

<u>Hence 2, -7 are roots of the equation X² + 5X - 14 = 0</u>

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2 years ago
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2 years ago
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