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2 years ago

Is it A. x= _ b.the solution is all real numbers c.there is no solution

Mathematics

1 answer:

Gemiola [76]2 years ago

8 0

The value of x in the equation is - 3.

<h3>How to find the variable in an equation?</h3>

Variables are number represented by a letter in an equation.

Therefore,

-5x - 9 = 2x + 12

subtract 12 from both sides of the equation

-5x - 9 = 2x + 12

-5x - 9 - 12 = 2x + 12 - 12

-5x - 21 = 2x

add 21 to both sides of the equation

-5x - 21 = 2x

-5x - 21 + 21 = 2x + 21

-5x = 2x + 21

subtract 2x from both sides

-5x = 2x + 21

-5x - 2x = 2x -2x + 21

-7x = 21

divide both sides by -7

-7x / -7 = 21 / - 7

x = -3

learn more on equation here: brainly.com/question/7421811

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Answer:

h(x) is the NEGATIVE of g(x)

Step-by-step explanation:

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h(x) is the NEGATIVE of g(x): h(x) = -x^2 = -g(x)

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3 years ago

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3 years ago

3. State if each statement is correct. If it is not correct, then fix the mistake.

olya-2409 [2.1K]

Answer:

All are incorrect

Step-by-step explanation:

Required

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$2x * 2x = 4x^2$ ---- fixed

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This is incorrect because:

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$3x^3 * 3x^3 = 9x^(3+3)$

$3x^3 * 3x^3 = 9x^6$ ---- fixed

$(c)\ 4x(4x + 5) =8x + 5$

This is incorrect because:

$4x(4x + 5) =4x * 4x + 4x * 5$

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4 0

4 years ago

Find the area of this

Ilya [14]

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Step-by-step explanation:

The equation to find the area of a semi circle is (Area= Pi * Radius^2 / 2)

The equation I created was 3.14*6^2/2 and after calculating is how I came up with the answer.

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4 years ago

Simplify 5/8x -2y +3/4x-8y

AleksandrR [38]

Answer:

On simplification, $\frac{5}{8}x - 2y + \frac{3}{4}x -8y = (\frac{11}{8}) x - 10y$

Step-by-step explanation:

Here, the given expression is:

$\frac{5}{8}x - 2y + \frac{3}{4}x -8y$

Now, we can perform operations only on LIKE TERMS,

So, in this expression, separate the like terms we get:

$\frac{5}{8}x - 2y + \frac{3}{4}x -8y = \frac{5}{8}x + \frac{3}{4}x - 2y -8y\\= (\frac{5}{8} + \frac{3}{4})x -(2y + 8y) = (\frac{5 + 3(2)}{8}) x - (10y)\\= (\frac{11}{8}) x - 10y\\\implies \frac{5}{8}x - 2y + \frac{3}{4}x -8y = (\frac{11}{8}) x - 10y$

Hence, on simplification, $\frac{5}{8}x - 2y + \frac{3}{4}x -8y = (\frac{11}{8}) x - 10y$

8 0

3 years ago