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3 years ago

Four less than twice number is ten. Find the number

Mathematics

1 answer:

sertanlavr [38]3 years ago

3 0

Answer:

English to Algebra translation says that "four less than twice a number is 10" yields the equation 2N - 4 = 10 2N = 14 N = 7

Step-by-step explanation:

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Answer:

98% Confidence interval: (4.144 ,4.498)

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We are given the following in the question:

4.751, 4.373, 4.177, 4.676, 4.425, 4.228, 4.125, 4.251, 3.951, 4.192, 4.291, 4.414

Formula:

$\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}}$

where $x_i$ are data points, $\bar{x}$ is the mean and n is the number of observations.

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$Mean =\displaystyle\frac{51.854}{12} = 4.321$

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98% Confidence interval:

$\bar{x} \pm t_{critical}\displaystyle\frac{s}{\sqrt{n}}$

Putting the values, we get,

$t_{critical}\text{ at degree of freedom 11 and}~\alpha_{0.02} = \pm 2.718$

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Four less than twice number is ten. Find the number​

Four less than twice number is ten. Find the number