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4 years ago

Find the value of x for which

Mathematics

1 answer:

Artyom0805 [142]4 years ago

4 0

B

hope this helps :)
(can you please mark me as brainliest?)

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Sloan [31]

Answer:

Sum of $\frac{7x}{x^2-4}$ and $\frac{2}{x+2}$ is $\mathbf{\frac{9x-4}{x^2-4}}$

Option B is correct answer.

Step-by-step explanation:

We need to find sum of $\frac{7x}{x^2-4}$ and $\frac{2}{x+2}$

Finding sum of $\frac{7}{x^2-4}$ and $\frac{2}{x+2}$ :

$\frac{7x}{x^2-4}+\frac{2}{x+2}$

We know that $x^2-4 =(x+2)(x-2)$

Replacing x^2-4

$\frac{7x}{(x+2)(x-2)}+\frac{2}{x+2}$

Now, taking LCM of (x+2)(x-2) and (x+2) we get (x+2)(x-2)

$=\frac{7x+2(x-2)}{(x+2)(x-2)}\\=\frac{7x+2x-4}{(x+2)(x-2)}\\=\frac{9x-4}{(x+2)(x-2)}\\=\frac{9x-4}{x^2-4}$

So, Sum of $\frac{7x}{x^2-4}$ and $\frac{2}{x+2}$ is $\mathbf{\frac{9x-4}{x^2-4}}$

Option B is correct answer.

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3 years ago

$258 with a 5.7% sales tax

Alla [95]

the total tax is 14.71
the total cost is 272.71

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3 years ago

Read 2 more answers

The underground ride is 861 mater long, what isthis number rounded to the nearest 100?

KATRIN_1 [288]

the underground ride is 861 mater long, what isthis number rounded to the nearest 100?

Answer:

861 ≈ 900

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3 years ago

Read 2 more answers

Is 3(5x - 4) = 15x - 12 a one solution , no solution or infinite solutions

vaieri [72.5K]

Answer:

Infinite Solutions

Step-by-step explanation:

3(5x - 4) needs to be simplified

So we multiply 5x by 3

So 3 x 5x = 15x

Then we multiply -4 by 3

3 x -4 = - 12

Put those together we get 15x - 12

The same equation as the one on the right side

So since 15x - 12 = 15x - 12, the x variable can be any number

Also a little tip:

With Forms quizzes, you can hit control + U and find the answers in the code

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3 years ago

A dragon can fly 50 feet in 2. Second. About how far can adragon fly in 11 secs

andrey2020 [161]

Answer:

275

Step-by-step explanation:

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3 years ago