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atroni [7]
2 years ago
11

PROCEDIMIENTO POR FAVOR

Mathematics
1 answer:
Allisa [31]2 years ago
8 0

Responder:

Número total de bolas = 245/23

Explicación paso a paso:

Dado que:

Bolas blancas = 1/5

Bolas negras = 1/7

Bolas rojas = 7

Sea el número total de bolas = x

Bolas blancas = 1 / 5x

Bolas negras = 1 / 7x

Por tanto, total;

(x / 5 + x / 7 + 7) = x

((7x + 5x) / 35) +7 = x

(12x / 35) + 7 = x

7 = x - 12x / 35

7 = (35x - 12x) / 35

7 = 23 veces / 35

245 = 23x

x = 245/23

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Step-by-step explanation:

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kirill [66]

x = 4 and EF = 4 ⇒ 3rd answer

Step-by-step explanation:

If two triangles are congruent, then

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∵ △ ABC ≅ △ DEF

∴ AB ≅ DE

∴ BC ≅ EF

∴ AC ≅ DF

∵ BC = 4 x - 12

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Let us solve the equation to find x

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- Add 3 x for both sides

∴ 7 x - 12 = 16

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∴ x = 4

Substitute the value of x in the expression of EF

∵ EF = -3 x + 16

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∴ EF = -3(4) + 16 = -12 + 16

∴ EF = 4

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Learn more:

You can learn more about congruence of Δs in brainly.com/question/3202836

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6 0
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The diameter of a bacteria colony that doubles every hour is represented by the graph below. What is the diameter of the bacteri
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y = A * (b) ^ x

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We must now look for the value of A.

To do this, we evaluate an ordered pair of the graph:

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Answer:

the diameter of the bacteria after 9 hours is:

y = 512

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