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2 years ago

What does x equal? Thanks!

Mathematics

2 answers:

Tasya [4]2 years ago

7 0

Answer:

Hi there!

The answer to this question is x=79

Step-by-step explanation:

using the triangle sum theorem

you know all angles add up to 180

so in other words: x+(x-17)+39=180

then you simplify: 2x=158

x=79

mel-nik [20]2 years ago

3 0

X+x-17+39=180
2x+22=180
Subtract 22 from both sides
2x=158
X= 79

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Radda [10]

Answer:

Step-by-step explanation:

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2 years ago

Solve the system by substitution. y=−3x-2 -7x+3y=10 PLEASE HELP

enyata [817]

Y=-3x-2
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3 years ago

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Inga [223]

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2 years ago

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gregori [183]

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2 years ago

On a test that has a normal distribution, a score of 19 falls one standard deviation below the mean, and a score of 40 falls two

nexus9112 [7]

Hi there!

We can use the following equation:

$\large\boxed{z = \frac{x-\mu}{\sigma}}$

z = amount of standard deviations away a value is from the mean (z-score)

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Plug in the knowns for both and rearrange to solve for the mean:

$-1 = \frac{19-\mu}{\sigma}\\\\-\sigma = 19 - \mu\\\\ \sigma = -19 + \mu$

Other given:

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Set both equal to each other and solve:

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1 year ago