3 years ago

Solve 4x - 5x + 2 = 3(2x - 4) A. 2 B. 3 C. 4 D. 5

Mathematics

1 answer:

aliina [53]3 years ago

3 0

Answer:

The true answer is A

Step-by-step explanation:

- x + 2 = 6x - 12

- x - 6x = - 12 - 2

- 7x = - 14

x = - 7 : - 14

X = 2

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The standard error for the difference in means is given by :-

$SE.=\sqrt{\dfrac{\sigma_1^2}{n_1}+\dfrac{\sigma^2_2}{n_2}}$

where , $\sigma_1$ = Standard deviation for sample 1.

$n_1$ = Size of sample 1.

$\sigma_2$ = Standard deviation for sample 2.

$n_2$ = Size of sample 2.

Let the sample of Latino name is first and non -Latino is second.

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$\sigma_1=82$

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$\sigma_2=101$

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The standard error for the difference in means will be :

$SE.=\sqrt{\dfrac{(82)^2}{9}+\dfrac{(101)^2}{14}}$

$SE.=\sqrt{\dfrac{6724}{9}+\dfrac{10201}{14}}$

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