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Studentka2010 [4]
2 years ago
10

What is the value of y?​

Mathematics
1 answer:
prohojiy [21]2 years ago
8 0

Answer:

it is 108 because 180-72

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Iq scores are normally distributed with a mean of 100 and a standard deviation of 15.
bearhunter [10]

Mean is \mu=100 and a standard deviation is \sigma =15, then the variable X\sim N(100,15^2).

Use substitution

Z=\dfrac{X-\mu}{\sigma},\\  \\ Z=\dfrac{X-100}{15}.

This substitution gives you that Z\sim N(0,1).

a. For X=130, Z=\dfrac{130-100}{15}=2 and Pr(X>130)=Pr(Z>2) =0.9772 (the decimal value is taken from the Standard Normal Distribution Table).

b. For X=90, Z=\dfrac{90-100}{15}=-\dfrac{2}{3} and for X=110, Z=\dfrac{110-100}{15}=\dfrac{2}{3}. Then Pr(90 (the decimal value is taken from the Standard Normal Distribution Table).

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3 years ago
4. Which value for x makes the sentence true?<br> 3x - 8 = 16<br> x=
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Answer: x = 8

Step-by-step explanation:

This is a very, very, very simple algebra problem. I assume you know the basics of algebra.

First, move 8 to the other side:

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divide by 3 on both sides

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There! Would it kill you to give me a quartic question to spice my life up?

4 0
1 year ago
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lorasvet [3.4K]

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