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9966 [12]
2 years ago
5

Two step equations -21 = -21 - b​

Mathematics
1 answer:
eimsori [14]2 years ago
7 0

Answer:

infinite amount of solutions.

Step-by-step explanation:

-21=-21-b

-b= -21+21

-b= 0

There is no argument: In real numbers, not only is x/0 undefined for any x, but infinity is not a number, thus it cannot be the result of a division. But there are ways to extend the real numbers (in other words, consider new systems) that do have one or more points at infinity, and some even permit arithmetic to be extended.

Hope I helped

-Liberty 8th grade, Chicago Illinois.

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The range is 

r: {-9,4,6,8, 10}

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A parabola is defined by the equation x2 = y. In which direction will the parabola open?
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The amount of time that a customer waits on hold at a call center can be modeled by a uniform distribution on the interval from
Contact [7]

Using the uniform distribution, we have that:

a) The density curve is given at the end of this question.

b) 16.67% of the time does a customer have to wait between 100 and 120 seconds.

-----------------

The uniform distribution has two bounds, a and b, and the probability of finding a value between c and d is given by:

P(c \leq X \leq d) = \frac{d - c}{b - a}

  • Uniform distribution on the interval of 0 to 120 seconds, thus a = 0, b = 120.

The proportion between 100 and 120 seconds is:

P(100 \leq X \leq 120) = \frac{120 - 100}{120 - 0} = \frac{1}{6} = 0.1667

0.1667*100% = 16.67%

16.67% of the time does a customer have to wait between 100 and 120 seconds.

A similar problem is given at brainly.com/question/15855314

4 0
3 years ago
What is bigger 3/4 or 4/15?​
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Answer:

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Step-by-step explanation:

and 4/15 is a smaller

3 0
4 years ago
The U.S. Energy Information Administration (US EIA) reported that the average price for a gallon of regular gasoline is $3.94 (U
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Answer:

a) 25

b) 49

c) 97

Step-by-step explanation:

The sample size is calculated using the formula, n = (\frac{\sigma\times z}{\textup{Margin of error}})^2

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Given:

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standard deviation = $0.25

thus,

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n = (\frac{\sigma\times z}{\textup{Margin of error}})^2

or

n = (\frac{0.25\times1.96}{\textup{0.10}})^2

or

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or

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b) for margin of error = $0.07

n = (\frac{\sigma\times z}{\textup{Margin of error}})^2

or

n = (\frac{0.25\times1.96}{\textup{0.07}})^2

or

n = 7²

or

n = 49

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n = (\frac{\sigma\times z}{\textup{Margin of error}})^2

or

n = (\frac{0.25\times1.96}{\textup{0.05}})^2

or

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or

n = 96.04 ≈ 97               (Rounded off to next integer)

6 0
4 years ago
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