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4 years ago

Simplify 5(x-2) - 3x + 4

Mathematics

2 answers:

swat324 years ago

6 0

Answer:

2x-6

Step-by-step explanation:

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PilotLPTM [1.2K]4 years ago

4 0

Answer:

y= 2x-6

Step-by-step explanation:

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Step-by-step explanation:

The formula to find the minimum sample size is given by :_

$n=(\dfrac{z^*\cdot \sigma}{E})^2$

, where $\sigma$ = population standard deviation.

z*= critical z-value.

E= Margin of error.

Given : $\sigma= 13$

E= ± 8

We know that critical value corresponding to 99% confidence level = z*=2.576 [Using z-table]

Then, the required sample size would be :

$n=(\dfrac{(2.576)\cdot (13)}{8})^2$

$\Rightarrow\ n=(4.186)^2$

$\Rightarrow\ n=17.522596\approx18$ [Round to next integer.]

Hence, the required minimum sample size = 18

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