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1 year ago

15

2(x + 3) = x - 4 Solve this equation

2 answers:

a_sh-v [17]1 year ago

8 0

Hii!

$\leadsto\parallel\boldsymbol{Answer.}\parallel\gets$

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x=-10

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$\multimap\parallel\boldsymbol{Explanation.}\parallel\gets$

Let's distribute 2 first. $\sf 2(x+3)== > 2x+6}$

$\sf 2x+6=x-4}$ .

Now subtract 6 from both sides.

$\sf 2x=x-4-6} \\ 2x=x-10$

Now we subtract x from both sides.

$\sf 2x-x=-10}\\x=-10}$

Hope that this helped! Best Wishes.

$\textsl{Reach far. Aim high. Dream big.}$

$\boldsymbol{-Greetings!-}$

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marissa [1.9K]1 year ago

7 0

Answer:

Its x=-10

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

For this problem we have the following data given:

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$\bar X_2 = 8$ represent the sample mean for the other department

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$n_2 = 20$ represent the sample size for the second group

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The confidence interval for the difference in the true means is given by:

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And the critical value for this case is $t_{\alpha/2}=2.02$

And replacing we got:

$(9-8) -2.02 \sqrt{\frac{2^2}{25} +\frac{1^2}{20}}= 0.0743$

$(9-8) +2.02 \sqrt{\frac{2^2}{25} +\frac{1^2}{20}}= 1.926$

And we are 9% confidence that the true mean for the difference of the population means is given by:

$0.0743 \leq \mu_1 -\mu_2 \leq 1.926$

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