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Kipish [7]
3 years ago
11

I need the answer to this question.

Mathematics
1 answer:
Pavlova-9 [17]3 years ago
7 0

Answer:

The value of x is 9.

The value of y is 18.

Step-by-step explanation:

The given triangle is a right angled triangle.

We have: $ tan(x) = \frac{opp}{adj} $

Therefore, $ tan(30)  =  \frac{x}{9\sqrt{3}} $

Since, $ tan(30) = \frac{1}{\sqrt{3}} $

Therefore, we have:

$ \frac{1}{\sqrt{3}} = \frac{x}{9\sqrt{3}} $

$ \implies x = 9 $

Now, 'y' is the hypotenuse.

Use Pythagoras theorem, we have $ x^2 + (9\sqrt{3}})^2 = y^2 $

Substituting x = 9, we get:

81 + 81(3) = y²

$ \implies y^2 = 81 + 243 $

$ \implies y^2 = 324 $

$ \therefore y = 18 $

Hence, the value of y = 18.

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Answer:

y = -47

Step-by-step explanation:

To find the midpoint of two points, add them together and divide by 2

(y+33)/2 = -7

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(y+33)/2 *2 = -7*2

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Solve for y:
2x+7=3y-1
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In a book the characters are trying to determine whether the Poisson probabilistic model can be used to describe the locations t
oksian1 [2.3K]

Answer:

The estimated mean number of rockets hits in the region is 533.

Step-by-step explanation:

We are given the following information,

Number of rocket hits     |    Observed number of regions

0                                       |                       228

1                                        |                       214

2                                       |                        94

3                                       |                        32

4                                       |                         7

5                                       |                        0

6                                       |                        0

7                                       |                         1

We are asked to estimate the mean number of rocket hits in the region.

The mean or expected value is given by

\mu = \sum (x \cdot P(x)) \\\\\mu = (0 \cdot 228) + (1 \cdot 214) + (2 \cdot 94) + (3 \cdot 32) + (4 \cdot 7) + (5 \cdot 0) + (6 \cdot 0) + (7 \cdot 1) \\\\\mu = 0 + 214 +188+ 96 +28 +0+ 0 + 7 \\\\\mu = 533

Therefore, the mean number of rockets hits in the region is 533.

5 0
4 years ago
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