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3 years ago

HELP PLS Is this set of ordered pairs a function (8,4) (6,2) (1,9) (3,8) (0,7)

Mathematics

2 answers:

Kaylis [27]3 years ago

7 0

Answer:

yes

Step-by-step explanation:

functions are defined by the vertical line test because for every x input you need a unique y and none of the points you listed share an x value

Mrrafil [7]3 years ago

4 0

Answer:

Step-by-step explanation:

They are not being added by the same number each time.

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The answer is 12.231

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3 years ago

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20 points for brainliest answer do not guess.Which expression is equivalent to 2x + 3y - x - (8 + 1)

Yuri [45]

The correct answer is 'C'

If X = 2, and Y = 4:

2(2) + 3(4) - 2 - (8 + 1) = 5
4 + 12 - 2 - 9 = 5
16 - 2 - 9 = 5
14 - 9 = 5
= 5

(2) + 3(4) - 9 = 5
2 + 12 - 9 = 5
14 - 9 = 5
= 5

So, your answer would be 'C' X + 3Y - 9

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3 years ago

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the table shows the shoe colour of 21 people a bar chart showing this information has been started a) fill in the lable for the

lys-0071 [83]

Answer:

There is no table

Step-by-step explanation:

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3 years ago

The average lifetime of a certain new cell phone is 3.4 years. The manufacturer will replace any cell phone failing within three

melisa1 [442]

Answer:

68% of these phones last 3.87 years.

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:

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

The average lifetime of a certain new cell phone is 3.4 years.

This means that $m = 3.4, \mu = \frac{1}{3.4} = 0.2941$

$P(X \leq x) = 1 - e^{-0.2941x}$

68% of these phones last how long (in years)?

This is x for which:

$P(X \leq x) = 0.68$

$P(X \leq x) = 1 - e^{-0.2941x}$

Then

$0.68 = 1 - e^{-0.2941x}$

$e{-0.2941x} = 0.32$

$\ln{e{-0.2941x}} = \ln{0.32}$

$-0.2941x = \ln{0.32}$

$x = -\frac{\ln{0.32}}{0.2941}$

$x = 3.87$

68% of these phones last 3.87 years.

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3 years ago

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r-ruslan [8.4K]

Answer:

128 fl oz

Step-by-step explanation:

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