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Ann [662]
3 years ago
10

(Please help)Choose the correct answer and please explanation each (Brainliest)

Mathematics
1 answer:
Vesnalui [34]3 years ago
3 0

Answer:

1. C

2. D

3. C

Explanation:

1. Girls = 12 plus twice the number of boys, so  C. y = 12 + 2x.

2. You have to see which point has the second value being greater than the first value:

 A) -1 > -2 is not true

 B) 0 > 1 is not true

 C) 2 > 3 is not true

 D) 8 > 4 is true, so it's D

3. Add the two values and see if it's less than 5

 A) -1-4 < 5 is true

 B) 0 + 4 < 5 is true

 C) 1 + 7 < 5 is not true, so this is the answer

 D) 2 + 2 < 5 is true

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The standard deviation for a set of data is 7.5. The mean is 235. What is the margin of error?
blondinia [14]

The margin of error is 0.97849

we are given

mean=235

so,

n=235

standard deviation =7.5

so,

\sigma=7.5

we know that

ME=2*standard error

and

SE=\frac{\sigma }{\sqrt{n} }

If confidence level is 95%, then we can multiply by 1.96

so, we can multiply by 2 to get ME

now, we can use marginal error formula

ME=\frac{2\sigma }{\sqrt{n} }

now, we can plug values

and we get

ME=\frac{2\times 7.5 }{\sqrt{235} }

ME=0.97849

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Answer:

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General Formulas and Concepts:

<u>Algebra I</u>

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<u>Step 1: Define</u>

Slope <em>m</em> = 2

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