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3 years ago

-3(x - 1) + 8 (32 = 3) = x + 7

Mathematics

2 answers:

joja [24]3 years ago

8 0

Answer:

Step-by-step explanation:

First distribute the -3 and the 8

Combine like terms

Move the -3x to the other side by adding 3x to each side

Now move the 7 to the other side by subtracting 7 from each side

Finally, divide both sides by 4 to get x

-3(x-1) + 8(32-3) = x + 7

-3x +3 + 256 - 24 = x + 7

-3x +235 = x + 7

235 = 4x + 7

228 = 4x

57 = x

valkas [14]3 years ago

3 0

Your correct answer should be 57 I hope this is right

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4 years ago

Relationships between means, standard deviations, X values,and z-scores

Vlada [557]

Answer:

a) The average salary of firefighters in Portugal is $583.

b) The standard deviation of the salary of firefighters in Portugal is $319.8

Step-by-step explanation:

We are given the following in the question:

a) Standard Deviation, σ = $145.80

We are given that the distribution of salary of professor is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

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Thus, the average salary of firefighters in Portugal is $583.

b) Mean, μ = $2,132

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$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

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Putting values, we get,

$0.50 = \displaystyle\frac{2291.90-2132}{\sigma}\\\\\sigma= \frac{2291.90-2132}{0.50}\\\\\sigma = 319.8$

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4 years ago

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Fantom [35]

Answer:

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