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tankabanditka [31]
3 years ago
6

3. Find the missing measures. 107° z° x° y°

Mathematics
2 answers:
12345 [234]3 years ago
6 0

Answer:

Z and X = 73

Y = 107

Step-by-step explanation:

Effectus [21]3 years ago
3 0

Answers:

  • x = 73
  • y = 107
  • z = 73

============================================

Work Shown:

x+107 = 180

x = 180-107

x = 73

The value of y is y = 107 since angle y and the 107 degree angle are vertical angles. Vertical angles are always congruent. You could also do x+y = 180, plug in x = 73, and solve for y to get y = 107.

Since the other pair of vertical angles is x and z, this means x = z = 73. Or you could solve z+107 = 180 to get z = 73.

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Through any 2 points there is exaclty_____line.
mr Goodwill [35]

Answer:

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Step-by-step explanation:

Through any 2 points, there is exactly one line.

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3 years ago
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5t-14=-14<br> solve the equation for t
ikadub [295]

Hi there!


Before we begin, let's rewrite your equation. :)


5t - 14 = -14


Step 1) Add 14 to both sides.


5t - 14 + 14 = -14 + 14 5t = 0


Step 2) Divide both sides by 5.


\frac{5t}{5} =  \frac{0}{5}


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Final Answer -


t = 0


Hope this helps!

Message me if you need anymore help! :D


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Answer:

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Step-by-step explanation

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f) The life of a power transmission tower is exponentially distributed, with mean life 25 years. If three towers, operated indep
Step2247 [10]

Answer:

15.24% probability that at least 2 will still stand after 35 years

Step-by-step explanation:

To solve this question, we need to understand the binomial distribution and the exponential distribution.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

Exponential distribution:

The exponential probability distribution, with mean m, is described by the following equation:

f(x) = \mu e^{-\mu x}

In which \mu = \frac{1}{m} is the decay parameter.

The probability that x is lower or equal to a is given by:

P(X \leq x) = \int\limits^a_0 {f(x)} \, dx

Which has the following solution:

P(X \leq x) = 1 - e^{-\mu x}

The probability of finding a value higher than x is:

P(X > x) = 1 - P(X \leq x) = 1 - (1 - e^{-\mu x}) = e^{-\mu x}

Probability of a single tower being standing after 35 years:

Single tower, so exponential.

Mean of 25 years, so m = 25, \mu = \frac{1}{25} = 0.04

We have to find P(X > 35)

P(X > 35) = 1 - P(X \leq x) = 1 - (1 - e^{-\mu x}) = e^{-0.04*35} = 0.2466

What is the probability that at least 2 will still stand after 35 years?

Now binomial.

Each tower has a 0.2466 probability of being standing after 35 years, so p = 0.2466

3 towers, so n = 3

We have to find:

P(X \geq 2) = P(X = 2) + P(X = 3)

In which

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 2) = C_{3,2}.(0.2466)^{2}.(0.7534)^{1} = 0.1374

P(X = 3) = C_{3,3}.(0.2466)^{3}.(0.7534)^{0} = 0.0150

P(X \geq 2) = P(X = 2) + P(X = 3) = 0.1374 + 0.0150 = 0.1524

15.24% probability that at least 2 will still stand after 35 years

4 0
3 years ago
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