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dedylja [7]
4 years ago
11

How do I solve this?

Mathematics
2 answers:
Alexus [3.1K]4 years ago
5 0

x = 6

given

\frac{x+2}{x-2} = \frac{4}{8}

cross- multiply to obtain

8(x + 2) = 4(x - 2) ( distribute parenthesis on both sides )

8x + 16 = 4x - 8 ( subtract 4x from both sides )

4x + 16 = - 8 ( subtract 16 from both sides )

4x = - 24 ( divide both sides by 4 )

x = \frac{-24}{4} = - 6


k0ka [10]4 years ago
5 0

Hello there!

<u><em>Answer: ⇒ x=-6</em></u>

_________________________________________________________

Step-by-step explanation:

Apply fraction cross multiply.

(x+2)*8=(x-2)*4

Expand.

8x+16=4x-8

Subtract by 16 from both sides of equation.

8x+16-16=4x-8-16

Simplify.

8x=4x-24

Subtract by 4x from both sides of equation.

8x-4x=4x-24-4x

Simplify.

4x=-24

Divide by 4 from both sides of equation.

\frac{4x}{4}=\frac{-24}{4}

Simplify it should be correct answer.

x=-6

__________________________________________________________________

Hope this helps!

Thank you for posting your question at here on brainly.

Have a great day!

-Charlie

_________________________________________________________________

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The degrees of freedom are:

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Since we have a p value lower than the significance level given of 0.05 we can reject the null hypothesis and we can conclude that the true mean for car rental rates in Boston are significantly higher than those in Dallas

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