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Lina20 [59]
3 years ago
10

WILL GIVE BRAINLIEST...Which of the following is equivalent to -2i(6 - 7i)

Mathematics
2 answers:
Sav [38]3 years ago
8 0

Answer:

A: ( 0 - 2i ) ( 6 - 7i )

Step-by-step explanation:

-2i ( 6 - 7i )

= -14 - 12i

( 0 - 2i ) ( 6 - 7i )

= -14 - 12i

NeTakaya3 years ago
6 0

Answer:

(0-2i)(6-7i)

Step-by-step explanation:

The answer to this is pretty straightforward, as if you add a 0 to -2i, it will not change the expression.

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Answer:

n=(\frac{2.33(1400)}{400})^2 =66.50 \approx 67

So the answer for this case would be n=67 rounded up

Step-by-step explanation:

Information given

\bar X represent the sample mean for the sample  

\mu population mean

\sigma=1400 represent the sample standard deviation

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Solution to the problem

The margin of error is given by this formula:

ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}    (a)

And on this case we have that ME =400 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

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A zero in front of the x would make this a difference of two perfect squares. All of the other option would interfere by adding another term.
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