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3 years ago

لدينا متغير عشوائي طبيعي متوسطة مجهول و تباينه معلوم و يساوي 25 = ه ، و الوسط الحسابي للعينة 22 = X وحجم

Mathematics

2 answers:

andrezito [222]3 years ago

8 0

Answer:

english?

Step-by-step explanation:

nexus9112 [7]3 years ago

5 0

Answer:

can you pls translate the question to english

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Which polynomial is equivalent to this expression if n≠-1n≠-1? 3+n−2n21+n?

Irina18 [472]

I suppose that the expression you wanted to write is $\frac{3+n-2n^2}{1+n}$ . If so, then we have:

$\frac{3+n-2n^2}{1+n}= \frac{3+3n-2n-2n^2}{1+n} \\ \\ = \frac{3(1+n)-2n(1+n)}{1+n} = \frac{(3-2n)(1+n)}{1+n} \\ \\ =3-2n$

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3 years ago

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What are the coordinates of the point is 1/4 of the way from A (-6, -3) to B (6, 1)?

Amiraneli [1.4K]

Answer:

$(-3, -2)$

Step-by-step explanation:

To find the coordinates of the point is 1/4 of the way from A (-6, -3) to B (6, 1), we are going to be using the midpoint formula, which states that:

The midpoint is at $(\frac{x_{1} +x_{2} }{2}, \frac{y_{1} +y_{2} }{2})$ . Where:

$(x_{1}, x_{2}) = (-6, 6)$

$(y_{1}, y_{2}) = (-3, 1)$

Then, the midpoint is at:

$(\frac{-6 +6 }{2}, \frac{-3+1}{2})$ = $(0, -1)$

Now, to find the coordinates of the point that is 1/4 of the way, we are going to calculate the midpoint between the point 'A' and the midpoint previously caculated, as follows:

$(x_{1}, x_{2}) = (-6, 0)$

$(y_{1}, y_{2}) = (-3, -1)$

⇒ $(\frac{-6 +0}{2}, \frac{-3-1}{2})$ = $(-3, -2)$

Therefore, the point is 1/4 of the way from A to B is: $(-3, -2)$

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4 years ago

I need to find the area of the crater

expeople1 [14]

First you need to find the r, if C=2pieR, than 2.4=2pieR now you divide 2.4 by 2 so you got 1.2=pieR now you divide 1.2 by pie and obtained aproximately 0.38 miles, that is your R, now you do pie multiply by 0.38 exposant 2 and there you go, your answer is aproximately 0.45 miles2 :)

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4 years ago

Convert from DMS (degrees, minutes, seconds) to decimal form (degrees)

tino4ka555 [31]

All I remember is: 1° (degree) = 60' (minute) = 3600" (second) and use the given numbers to put on the..... d° m' s"........dd = d + m/60 + s/3600

1) 118°44'15" => 118/1 + 44/60 + 15/3600 = 118.7375

same thing with
2) <span>48°30'36" => 48 + 30/60 + 36/3600 = 48.51</span>

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4 years ago

Lanie reads 25 pages in 30 minutes. If Paine reads 200 pages at the same rate how long will it take her?

lubasha [3.4K]

Answer:

240 minutes/ 4 hours

Step-by-step explanation:

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3 years ago

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