2 years ago

Which of the following conditions does NOT create a triangle?

Mathematics

2 answers:

scoundrel [369]2 years ago

5 0

The answer to this question is C

Elis [28]2 years ago

3 0

Answer:

A triangle with three angles that each measure between 0º and 90º.

A triangle with one angle that measures between 90º and 180º.

A triangle containing a right angle.

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The sum of the first n terms of an arithmetic sequence is n/2(4n + 20).

lesantik [10]

Answer:

(a).

$S_{n} = \frac{n}{2} (4n + 20) \\ \\S _{n - 1} = \frac{(n - 1)}{2} (4n - 4 + 20) \\ \\ S _{n - 1} = \frac{(n - 1)}{2} (4n + 16) \\ \\S _{n - 1} = \frac{(n - 1)(4n + 16)}{2} \\ \\ { \boxed{S _{n - 1} = {2 {n}^{2} + 6n - 8}}} \\$

(b).

from general equation:

$S _{n - 1} = \frac{(n - 1)}{2} (4n + 16)$

first term is 4n

common difference:

$16 = \{(n - 1) - 1 \}d \\ 16 = (n - 2)d \\ d = \frac{16}{n - 2}$

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3 years ago

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Kaylis [27]

I feel like it’s either 1 or 2

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2 years ago

What is the center of the circle for this equation:<br> (x - 10)² + (y - 10)² = 25

Nastasia [14]

Answer:

Step-by-step explanation:

center: (-2,3)

Radius: 5

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2 years ago

Which sets of ordered pairs represent a function? Select all that apply.

antoniya [11.8K]

Answer:

B, C, and E

Step-by-step explanation:

In order for a function to be a function, an ordered pair cannot be on the same x coordinate

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2 years ago

What is the value of y if y = |– 5|?<br><br> explain how you would get the answer step by step

Andrews [41]

Answer:

y=5

Step-by-step explanation:

The answer is 5 because that sign around the -5 is the absolute value sign. What the absolute value sign does is it measures the distance from 0 the number is. Since the number -5 is 5 units away from the number 0, then y=5.

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