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mel-nik [20]
3 years ago
9

Brainliest + Points!

Mathematics
1 answer:
12345 [234]3 years ago
4 0
The correct answer is C
Approximately 95% of data falls within 2 standard deviations (±2) of the mean.
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The sum of negative eighteen and a number is eleven. What is the number?
valentinak56 [21]

Answer:

-18 + x = 11

x = 29

Step-by-step explanation:

To solve this, you can use the formula of a + b = c

-18 + x = 11\\-18 = 18\\11 + 18 = 29\\x = 29

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Step-by-step explanation:

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adoni [48]

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Step-by-step explanation:

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8 0
3 years ago
Explain how you can prove your observations in Questions 3 and 5 using a traditional proof. You don’t need to develop the steps
Salsk061 [2.6K]

Answer:

A diagonal divides the parallelogram into two triangles. If I can prove that the two triangles are congruent, then the corresponding angles and corresponding sides of those two triangles must be congruent. To prove triangle congruency, I can use the properties of the angles formed when parallel lines are cut by a transversal.

Step-by-step explanation:

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