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3 years ago

What is the answer to this questions it is worth 20 points

Mathematics

1 answer:

irinina [24]3 years ago

3 0

<h2><u>Answer</u> : </h2>

By observing the table we can conclude that for the number of years to travel back double the electricity is required .

i.e. for 5 years = 10 megawatts

therefore, the relationship between x and y can be depicted by the following equation :

$\boxed{ \boxed{y = 2x}}$

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Nêu mệnh đề phủ định của mệnh đề sau và xét tính đúng sai của mệnh đề phủ định: ∀x∈R:x^{2} ≠ 1

disa [49]

Answer:

true

Step-by-step explanation:

$existential \: element \: of \: real \: number \: \binom{o}{o} x {}^{2} = 1$

6 0

3 years ago

The length of a string in yards is a function f(n) of the length n in inches. Write a function rule for this situation

igor_vitrenko [27]

Answer:

f(n) = n/36

Step-by-step explanation:

The length of a string is given in yards, is a function f(n) of the length n in inches.

We have to write a function rule for this situation.

∵ 36 inches = 1 yard

∴ 1 inch = 1/36 (yard)

∴ n inches = n/36

and function representing the length will be

f(n) = n/36

4 0

3 years ago

Read 2 more answers

Mickey used to work at Best Buy and was also offered that other job at The Digital Source. In the end, she declined both of thos

Andreas93 [3]

Answer:

Step-by-step explanation:

Hello,

For two different points $(x_1,y_1)$ , $(x_2,y_2)$ , the slope of this function is

$\dfrac{y_2-y_1}{x_2-x_1}$

so in this example it comes

$\dfrac{395-275}{11-5}=\dfrac{120}{6}=20$

The slope of this function is 20

6 0

3 years ago

Stereo speakers are manufactured with a probability of 0.100.10 being defective. TwentyTwenty speakers are randomly selected. Le

olga nikolaevna [1]

Answer:

The expected value of X is 2 with a standard deviation of 1.34.

Step-by-step explanation:

For each speaker, there are only two possible outcomes. Either it is defective, or it is not. The probability of a speaker being defective is independent of other speakers. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

Probability of exactly x sucesses on n repeated trials, with p probability.

The expected value of the binomial distribution is:

$E(X) = np$

The standard deviation of the binomial distribution is:

$\sqrt{V(X)} = \sqrt{np(1-p)}$

Stereo speakers are manufactured with a probability of 0.1 of being defective

This means that $p = 0.1$

Twenty speakers are randomly selected.

This means that $n = 20$

Let the random variable X be defined as the number of defective speakers. Find the expected value and the standard deviation.

$E(X) = np = 20*0.1 = 2$

$\sqrt{V(X)} = \sqrt{np(1-p)} = \sqrt{20*0.1*0.9} = 1.34$

The expected value of X is 2 with a standard deviation of 1.34.

6 0

3 years ago

What is the anwser to this?

Elza [17]

Which one is it the top one or the bottom one?

6 0

3 years ago

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