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Ulleksa [173]
2 years ago
11

-2 • (-3)3 = ? i really need help, I’m struggling so much in math.

Mathematics
2 answers:
Ronch [10]2 years ago
6 0

Answer:

The answer would be 54

Step-by-step explanation:

nadezda [96]2 years ago
4 0

Let's break this statement into small pieces. Let's start with (-3)^{3}. This means -3 \times -3 \times -3 which is equal to -27 (-3 \times -3 = 9, 9 \times -3 = -27).

Note the following rules

  • - \times - = +
  • + \times + = +
  • - \times + = -
  • + \times - = -

Now let's solve the rest of the equation. -2 \cdot (-3)^{3} = -2 \cdot -27 (Note \cdot is the same as \times. = -2 \cdot -27, 54

The answer is 54

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Which answer is the approximate standard deviation of the data set?
Anna35 [415]

Answer:

3.4

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Standard deviation of a population is defined as:

σ² = ∑(xᵢ − μ)² / n

The standard deviation of a sample is defined as:

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Now we find the squares of the differences:

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= 80

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