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3 years ago

11

I need help with this question.

1 answer:

Yuliya22 [10]3 years ago

6 0

Answer:

Answer is option a) 6x m.

Step-by-step explanation:

$given \: \: diagonal \: \: d1 = x + 2 \: \: m \\ area \: \: = 3x {}^{2} + 6x \: \: \: m \\ to \: find \: d2 \: = answer \\ area \: of \: rhombus \: = \frac{1}{2} \times d1 \times d2 \\ 3x {}^{2} + 6x \: = \frac{1}{2} \times (x + 2) \times d2 \\ 2( \frac{3x {}^{2} + 6x }{x + 2} ) = d 2\\ \frac{6x {}^{2} + 12x}{x + 2} = d2 \\ \\ solving \: the \: above \: equation \: we \: get \: \\ d2 = 6x \: \: m$

If you have any doubts see the image.

hence answer is mentioned .

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3 years ago

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Alborosie

Using the geometric mean concept, it is found that the value of a is 18.

----------------------

The geometric mean, of a data-set of n elements, $(n_1, n_2, ..., n_n)$ , is given by:

$G = \sqrt[n]{n_1 \times n_2 \times ... \times n_n}$

That is, the nth root of the multiplication of all elements.

----------------------

In this question:

Two elements(n = 2), a and 34.
$G = 6\sqrt{17}$

Thus:

$\sqrt{34a} = 6\sqrt{17}$

We find the square of each side, so:

$(\sqrt{34a})^2 = (6\sqrt{17})^2$

$34a = 36\times17$

Simplifying both sides by 17:

$2a = 36$

$a = \frac{36}{2}$

$a = 18$

The value of a is 18.

A similar example is given at brainly.com/question/15010240

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