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3 years ago

2х + 5y = 0 3х – 4у = 23

Mathematics

2 answers:

lawyer [7]3 years ago

7 0

Correct answer:
X = 5
Y = -2

Fantom [35]3 years ago

4 0

Answer:

x=5

y=-2

Step-by-step explanation:

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The length of life of an electronic component has an exponential probability density function with mean 1000 hours. Find the pro

avanturin [10]

The probability that a component lasts at least 1500 hours using the exponential probability density function is 0.22313016014843.

The formula used to define the exponential distribution is called the exponential distribution formula. The variable needs to be continuous and independent for an exponential distribution. You may find the exponential distribution formula by using:

$f(x) = me^{-mx} \text{ or } f(x) = (1/\mu) e^{-(1/\mu)x}$

Where m is the rate parameter or the decay parameter, and μ is the mean.

In the question, the mean, μ = 1000 hours, and the variable, x = 1500 hours.

But, we need to find the probability that the component lasts at least 1500 hours, that is, x is greater than or equal to 1500, that is, f(x ≥ 1500), which, using the calculator, is computed to be 0.22313016014843.

Thus, the probability that a component lasts at least 1500 hours using the exponential probability density function is 0.22313016014843.

Learn more about the exponential probability density function at

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7 0

2 years ago

Suppose that a student is working on a statistic project using data on pulse rates collected from a random sample of 100 student

Hitman42 [59]

Answer:

The question is incomplete. The statements are:

a) I am 95% sure that all students will have pulse rates between 65.6 and

71.8 beats per minute . FALSE. The confidence interval is for the true value of the mean, not the individual values.

b) I am 95% sure that the mean pulse rate for this sample of students will fall between 65.5 and 71.8 beats per minute . FALSE. The sample mean is already included in the CI, as it was used to calculate it.

c) I am 95% sure that the confidence interval for the average pulse rate of all students at this college goes from 65.5 to 71.8 beats per minute . FALSE. The 95% only refers to the probability of the true mean to be within this interval.

d) I am sure that 95% of all students at this college will have pulse rates

between 65.5 and 71.8 beats per minute . FALSE. The confidence interval is for the true value of the mean, not the individual values.

e) I am 95% sure that the mean pulse rate for all US college students in

between 65.5 and 71.8 beats per minute. FALSE. This confidence is valid only for the population of students of her college, as the sample was taken from this population.

f) Of the mean pulse rates for students at this college, 95% will fall between

65.5 and 71.8 beats per minute. FALSE. The 95% is not the probability for individual values .

g) Of random samples of this size is taken from students at this college, 95% will have mean pulse rates between 65.5 and 71.8 beats per minute. FALSE. The 95% does not refer to the sampling distribution probabilities.

Step-by-step explanation:

8 0

3 years ago

5/8 + 3/10 = what would it be

natima [27]

This would equal 37/40 or 0.925 in decimal form

7 0

3 years ago

Read 2 more answers

Decide whether the triangles are similar

Ne4ueva [31]

The first one

Similar - SSS theorem

second one

Similar - AAA theorem

last one

Similar - SAS theorem

5 0

3 years ago

What is the value of x? -5x – 2 = -13

Phantasy [73]

Answer:

2.20

Step-by-step explanation:

So add +2 both sides that cancels 2 and that makes it -11.00 now divide it by -5 and x is by itself

So when you divide it x=2.20

Hope that helps

8 0

3 years ago

Read 2 more answers