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navik [9.2K]
3 years ago
11

Calcula la suma de los ángulos internos de los siguientes polígonos:

Mathematics
1 answer:
GenaCL600 [577]3 years ago
7 0

Answer:  a)pentágono 540° = 108×5  

b)heptágono 900°≈128.57 ×7

- c)octágono 1080° = 135 × 8

- d)nonágona 1260 = 140 × 9

Step-by-step explanation:

360 ÷ number of sides  = x  Subtract  x from 180 =y measure of interior∠

Multiply y × number of sides == sum of interior angles

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The number of hours a lightbulb burns before failing varies from bulb to bulb. The population distribution of burnout times is s
liubo4ka [24]

ANSWER:

The average burnout time of a large number of bulbs has a sampling distribution that is close to Normal.

STEP-BY-STEP EXPLANATION:

The cental limit theorem states, that id the sample size is large (30 or more), then the sampling distribution of the sample means is approximately normal with mean ц and standar deviation б/\sqrt{n}

Thus the correct answer is the average burnout time of a large number of bulbs has a sampling distribution that is close to Normal.

6 0
3 years ago
Solve and check the linear equation.<br> 3(x-2) + 8 = 2(x + 5)
ANEK [815]

Answer:

x = 8

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right  

Equality Properties

  • Multiplication Property of Equality
  • Division Property of Equality
  • Addition Property of Equality
  • Subtraction Property of Equality

<u>Algebra I</u>

  • Terms/Coefficients

Step-by-step explanation:

<u>Step 1: Define</u>

3(x - 2) + 8 = 2(x + 5)

<u>Step 2: Solve for </u><em><u>x</u></em>

  1. (Parenthesis) Distribute:                                                                               3x - 6 + 8 = 2x + 10
  2. Combine like terms:                                                                                     3x + 2 = 2x + 10
  3. {Subtraction Property of Equality] Subtract 2x on both sides:                    x + 2 = 10
  4. [Subtraction Property of Equality] Subtract 2 on both sides:                      x = 8

<u>Step 3: Check</u>

<em>Plug in x into the original equation to verify it's a solution.</em>

  1. Substitute in <em>x</em>:                                                                                               3(8 - 2) + 8 = 2(8 + 5)
  2. (Parenthesis) Subtract/Add:                                                                         3(6) + 8 = 2(13)
  3. Multiply:                                                                                                         18 + 8 = 26
  4. Add:                                                                                                               26 = 26

Here we see that 26 does indeed equal 26.

∴ x = 8 is the solution to the equation.

3 0
3 years ago
Which of the following expressions could be interpreted as "a number times negative seven added to five equals two"?
masha68 [24]

Answer:

5-7 x = 2

Step-by-step explanation:

a number times negative seven added to five equals two

7 0
3 years ago
Read 2 more answers
In creating the shooter-style game comparable to Space Invaders, we decided that each time the laser hits an object, the player
olya-2409 [2.1K]

Answer:

Outcome

Step-by-step explanation:

I'm not exactly certain but I believe the answer is outcome. For example: Each time the laser hits an object, the player gets a point. Because you're giving the cause, the laser hitting the object, and the effect, the player getting a point;its safe to assume that the element is outcome.

3 0
3 years ago
Consider the diagram.<br> What is the length of segment AB?
Vlad [161]
The answer would be B
6 0
2 years ago
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