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3 years ago

B = 23a + 1 b = -13a + 7

Mathematics

1 answer:

ohaa [14]3 years ago

8 0

The answer is the question

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What is step two in the problem solving process

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Hey there,
It would be devising a plan

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3 years ago

What is 0.3 recurring in a fraction?

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The decimal is equivalent to 4/5. Answer: The decimal is converted to 4/5 as a fraction.

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3 years ago

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A shuttle bus leaves from my office at a speed of 32 miles per

vesna_86 [32]

Answer:

2.6 hours

Step-by-step explanation:

use distance formula: d = r * t

83 = 32t

83/32 = t

2.6 = t

2.6 hours is 2 hours, 36 minutes

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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

What is the distance between (-2,-3) and (1, -3) ? units 0-1) units O units O 3 units

iren2701 [21]

Step-by-step explanation:

Hi... Your answer is 3 units

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3 years ago