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const2013 [10]
3 years ago
9

What does y equal?6=2(y+2)Thank you!

Mathematics
1 answer:
egoroff_w [7]3 years ago
7 0
6=2y+4
y is equal to 1
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I’m so confused I need help please!!
shutvik [7]

Answer:

5. 9 8. 2\sqrt{10}

Step-by-step explanation:

a²+b²=c²

so for #5 12²+b²=15²

144+b²=225 (subtract 144 from both sides)

b²=81

b=9

For #8

9²+b²=11²

81+b²=121 (subtract 81 from both sides)

b²=40

b=\sqrt{40}

\sqrt{40}=

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Step-by-step explanation:

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On Monday, the book store sold 75 books. On Tuesday, the bookstore sold 125 books. The bookstore must sell 500 books by Friday.
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Nikolay [14]

Answer:

p-value = 0.1277

Step-by-step explanation:

p-value is the probability value tell us how likely it is to get a result like this if the Null Hypothesis is true.

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Standard deviation(\sigma) = \sqrt{\frac{1}{n}\sum_{i=1}^{n}{(x_{i}-\bar{x})^{2}} }

where, \bar{x} is mean of the distribution.

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Applying t- test:

Let out hypothesis is:

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H₁: μ ≠ 4.35

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σ = Standard Deviation = 0.034

n = 10

t=\frac{\bar{x}-\mu}{\frac{\sigma}{\sqrt{n}} }

Putting all values we get, t = 1.6777 with (10 -1) = 9 degree of freedom.

Then the p-value at 99% level of significance.

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