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4 years ago

Simplify. (a−b+c)−(c+b)

Mathematics

2 answers:

miskamm [114]4 years ago

6 0

Answer:

a - 2b

Step-by-step explanation:

(a - b + c) - (c + b)

= a - b + c - c - b

= a - 2b

Maksim231197 [3]4 years ago

4 0

Answer:

a -2b

Step-by-step explanation:

(a−b+c)−(c+b)

Distribute the minus sign

a-b+c -c -b

Combine like terms

a -b -b +c-c

a -2b

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4 years ago

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nataly862011 [7]

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3 years ago

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Suppose that it is known that the number of items produced in a factory during a week is a random variable with mean 50. If the

iVinArrow [24]

Answer:

The probability would be 0.9586

Step-by-step explanation:

Given,

Mean, $\mu = 50$ ,

Variance, $\sigma^2 = 24$

Standard deviation,

$\sigma = \sqrt{24}=2\sqrt{6}$ ,

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Hence, the probability that this weeks production will be between 40 and 60

$=P(40 < X < 60)$

$=P(\frac{40-\mu}{\sigma} < \frac{X-\mu}{\sigma} < \frac{60-\mu}{\sigma})$

$=P(\frac{40-50}{2\sqrt{6}} < z < \frac{60-50}{2\sqrt{6}})$

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$=P(-2.041 < z < 2.041)$

$=P(z< 2.041) - P(z< -2.041)$

Using z score table

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3 years ago

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Step-by-step explanation:

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