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Amiraneli [1.4K]
2 years ago
12

Previous 2 Next Linear Equations: Mastery Test 2. Type the correct answer in the box. Use numerals instead of words. What value

of x makes this equation true? -6x + 3 = 45 Reset Next Eden its reserved K KE
- 6x + 3 = 45
​
Mathematics
1 answer:
Dmitry_Shevchenko [17]2 years ago
7 0

The value of the unknown variable "x" given that -6x + 3= 45 is -7

Equations are expressions separated by an equal sign.  They can contain one or more variables.

The equation given in question is a linear equation containing one unknown variable "x".

The equation is expressed as -6x + 3 = 45

To get the value of x, we will follow the steps below:

Step 1: Subtract 3 from both sides of the equation

-6x + 3 - 3 = 45 - 3

-6x = 42

Step 2: Divide both sides of the expression by -6

-6x/-6 =42/-6

x = -7

This shows that the value of the unknown variable "x" is -7.

Learn more here: brainly.com/question/2159099

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Given the complex number z_1=3\big(\cos \frac{14\pi}{15} +i\sin \frac{14\pi}{15}\big)z 1 ​ =3(cos 15 14π ​ +isin 15 14π ​ ) and
mars1129 [50]

The product of <em>z₁ =</em> 3 · (cos 14π/15 + i · sin 14π/15) and <em>z₂ =</em> 3 √3 · (cos 11π/15 + i · sin 11π/15) in <em>rectangular</em> form with fully simplified expressions is <em>z₁ · z₂ =</em> 7.794 - i · 13.5.

<h3>How to determine the product of two complex numbers</h3>

Let be two numbers of the form <em>z = a + i · b</em>, where <em>i =</em> √-1, the product of two of these numbers in <em>rectangular</em> form is described by the following formula:

<em>z₁ · z₂ = (a + i · b) · (c + i · d) = (a · c - b · d) + i · (a · d + b · c)</em>   (1)

If we know that a = 3 · cos 14π/15, b = 3 · sin 14π/15, c = 3√3 · cos 11π/15, d = 3√3 · sin 11π/15, then the result in rectangular form is:

<em>z₁ · z₂ =</em> 7.794 - i · 13.5

The product of <em>z₁ =</em> 3 · (cos 14π/15 + i · sin 14π/15) and <em>z₂ =</em> 3 √3 · (cos 11π/15 + i · sin 11π/15) in <em>rectangular</em> form with fully simplified expressions is <em>z₁ · z₂ =</em> 7.794 - i · 13.5. \blacksquare

<h3>Remark</h3>

The statement presents typing mistakes and is poorly formatted, the correct form is introduced below:

<em>Given the complex number z₁ = 3 · (cos 14π/15 + i · sin 14π/15) and z₂ = 3 √3 · (cos 11π/15 + i · sin 11π/15), express the result of z₁ · z₂ in rectangular form with fully simplified fractions and radicals.</em>

<em />

To learn more on complex numbers, we kindly invite to check this verified question: brainly.com/question/10251853

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kicyunya [14]

Step-by-step explanation:

Here we can see the both numbers are 7 with different powers so we can sum up the powers

{7}^{6 + 5}

{7}^{11}

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Answer:

<h2>In a quadrilateral, opposite angles are congruent.</h2>

Step-by-step explanation:

Angle B & D are both opposite to each other, yet congruent.

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