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tatiyna
4 years ago
14

Lines DE and AB intersect at point C. What is the value of x? A) 12 B) 25 C) 38 D) 52​

Mathematics
2 answers:
tatyana61 [14]4 years ago
8 0

Answer:

25

Step-by-step explanation:

edge 2020 Test

julia-pushkina [17]4 years ago
5 0

Answer:

B

Step-by-step explanation:

∠ACE and ∠ECB form a straight angle whose sum = 180°, hence

2x + 2 + 5x + 3 = 180

7x + 5 = 180 ( subtract 5 from both sides )

7x = 175 ( divide both sides by 7 )

x = 25 → C

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Explanation:

There are 5 people in total so the first place can be occupied by any of the 5 persons.

Secondly the second place in the line can be occupied by any of the 4 persons left.  

Then the third place will be occupied by any remaining 3 persons as the front two places are already occupied.

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3 years ago
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antoniya [11.8K]

Answer:

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4 0
3 years ago
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11. How many different ways can the 16 numbered pool balls be placed in a line on the pool table?
nikklg [1K]

Answer:

The number of ways are 16! or 20,922,789,888,000.

Step-by-step explanation:

Consider the provided information.

We need to determine the number of different ways 16 numbered pool balls be placed in a line on the pool table.

For the first place we have 16 balls.

For the second place we have 15 balls left.

Similarly for the third place we have 14 balls as two balls are already arranged and so on.

Or we can say that this is the permutation of 16 things taking 16 at a time.

Thus the number of ways are: 16! or  ^{16}P_{16}

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7 0
3 years ago
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ki77a [65]
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3 years ago
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