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1 year ago

Suppose y varies directly with x where y=21 when x=7 find y when x = 15

Mathematics

1 answer:

Romashka [77]1 year ago

3 0

Golfkrieg ist die ganze Woche im Auto oder ist das 56357

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Find the quotient of the problem using the area model strategy. After you have worked out your problems on a sheet of paper, you

Artist 52 [7]

Answer:

56 with re9

Step-by-step explanation make a square on a paper make 3 line on top of each line put 800 40 and 9 on the side put 15 search up 15 dived by 800 and 40 dived by 15 then 9 add it all up the yo go give me brainlist

8 0

2 years ago

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Suppose X has an exponential distribution with mean equal to 23. Determine the following:

e-lub [12.9K]

Answer:

a) P(X > 10) = 0.6473

b) P(X > 20) = 0.4190

c) P(X < 30) = 0.7288

d) x = 68.87

Step-by-step explanation:

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:

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

Mean equal to 23.

This means that $m = 23, \mu = \frac{1}{23} = 0.0435$

(a) P(X >10)

$P(X > 10) = e^{-0.0435*10} = 0.6473$

P(X > 10) = 0.6473

(b) P(X >20)

$P(X > 20) = e^{-0.0435*20} = 0.4190$

P(X > 20) = 0.4190

(c) P(X <30)

$P(X \leq 30) = 1 - e^{-0.0435*30} = 0.7288$

P(X < 30) = 0.7288

(d) Find the value of x such that P(X > x) = 0.05

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

$0.05 = e^{-0.0435x}$

$\ln{e^{-0.0435x}} = \ln{0.05}$

$-0.0435x = \ln{0.05}$

$x = -\frac{\ln{0.05}}{0.0435}$

$x = 68.87$

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2 years ago

Describe the transformation of the graph of the parent function y = √x for the function y = √x + 7 + 5.

Katarina [22]

Answer:

Step-by-step explanation:

I think it 3 sorry if it’s wrong

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2 years ago

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Determine the translation that maps point C(7,5) to point C'(5,5).

Ilia_Sergeevich [38]

Answer: Left 2

Step-by-step explanation:

Move 2 units back which is left

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3 years ago

If two lines are perpendicular, what is the product of their slopes?

Nadusha1986 [10]

The product of the slopes would be -1 because the slopes of two lines that are perpendicular are opposite reciprocals (ex. 2 and -1/2 multiplied together would be -1)

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3 years ago