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lina2011 [118]
3 years ago
11

For the line y=2/5x if the y-coordinate is 20 what is the x-coordinate

Mathematics
1 answer:
Nitella [24]3 years ago
6 0
Y=2/5x
20=2/5x
50=x
50*2/5=20
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Answer:

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The formula to compute the standard deviation of <em>X </em>is:

\sigma=\sqrt{E(X^{2})-(E(X))^{2}}

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(a)

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Thus, the mean or expected value of <em>X </em>is 2.2.

(b)

Compute the value of E (X²) as follows:

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\sigma=\sqrt{E(X^{2})-(E(X))^{2}}\\=\sqrt{6.58-(2.22)^{2}}\\=\sqrt{1.6516}\\=1.285\\\approx1.3

Thus, the standard deviation of <em>X</em> is 1.3.

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X + 5 + 11x = 12x + y

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