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Katyanochek1 [597]
3 years ago
14

What is the sum of 6 + -6 =

Mathematics
2 answers:
Vikentia [17]3 years ago
4 0
The sum of 6+-6 is 0.
inysia [295]3 years ago
4 0
The answer for your question is 0. Hope it helped you out.
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Part A: Find a rational number that is between 9.5 and 9.7. Explain why it is rational.
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9.6 yes because it can be expressed as a fraction
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Find the distance (-4,6) and (3,-7)
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Answer:

Distance ≈ 14.8

Step-by-step explanation:

<u>Calculate the distance (d) using the distance formula</u>

d = √ (x₂ - x₁ )² + (y₂ - y₁ )²

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A drunkard executes a “random walk” in the following way: each minute he takes a step north or southm with probability 1/2 each,
valentina_108 [34]
Assume that a step to the north is in the positive direction and a step in the south is in the negative direction.

Then,

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\sigma^2(X_i)=E(X_i^2)-E(X_i)^2 \\ \\ =50^2\left(\frac{1}{2}\right)+50^2\left(\frac{1}{2}\right)-0^2=2500\left(\frac{1}{2}\right)+2500\left(\frac{1}{2}\right)-0 \\ \\ =2500 \\ \\ \Rightarrow\sigma(X_i)=50

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and

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Therefore, by Central Limit Theorem, the distribution of the random walk is normal with a mean of 0 cm and a standard deviation of 17.32 cm. He is expected to be somewhere around his starting point after 1 hour.
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