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3 years ago

Work out the mean for the data set below: 6, 4

Mathematics

1 answer:

aliina [53]3 years ago

8 0

Answer:

Step-by-step explanation:

The mean is the same as the average value of a data set and is found using a calculation. Add up all of the numbers and divide by the number of numbers in the data set.

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I need help plz. Its DeMoivres Theorem

vagabundo [1.1K]

$\bf \qquad \textit{power of two complex numbers} \\\\\ [\quad r[cos(\theta)+isin(\theta)]\quad ]^n\implies r^n[cos(n\cdot \theta)+isin(n\cdot \theta)] \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ z=\stackrel{a}{-1}\stackrel{b}{-\sqrt{3}~i}~~ \begin{cases} r=\sqrt{a^2+b^2}\\ \theta =tan^{-1}\left( \frac{b}{a} \right)\\[-0.5em] \hrulefill\\ r=\sqrt{(-1)^2+(\sqrt{3})^2}\\ \qquad \sqrt{4}\\ \qquad 2\\ \theta =tan^{-1}\left( \frac{-\sqrt{3}}{-1} \right)\\\\ \qquad \frac{4\pi }{3} \end{cases}$

$\bf z=2\left[ cos\left( \frac{4\pi }{3} \right) -i~sin\left( \frac{4\pi }{3} \right)\right]\implies z^6=\left[ 2\left[ cos\left( \frac{4\pi }{3} \right) -i~sin\left( \frac{4\pi }{3} \right)\right] \right]^6 \\\\\\ z^6=2^6\left[ cos\left( 6\cdot \frac{4\pi }{3} \right) -i~sin\left( 6\cdot \frac{4\pi }{3} \right)\right]\implies z^6=64[cos(8\pi )-i~sin(8\pi )] \\\\\\ z^6=64[(-1)-i~(0)]\implies z^6=\stackrel{\stackrel{a}{\downarrow }}{-64}~~\stackrel{\stackrel{b}{\downarrow }}{-0i}$

4 0

3 years ago

What is -5% as a decimal

devlian [24]

-0.5

Answer: -0.5

Step-by-step explanation:

4 0

3 years ago

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Anna007 [38]

Answer:

Step-by-step explanation:

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3 years ago

A rectangle is placed around a semicircle as shown below. The length of the rectangle is 18mm . Find the area of the shaded regi

evablogger [386]

In the picture, it is a semicircle, so you have to remember to divide the area by 2.
The diameter of the circle is 18, so the radius is 9. Using the formula, I'll find the area.
9²π=81π= 254.34÷2= 127.17
Now finding the radius actually help, because that semicircle's height is its radius, which is 9.
18 ×9 = 162
Now I'm going to find the shaded area.
162 - 127.17 = 34.83 mm²

6 0

3 years ago

Tom has 25 gallons of gas and needs to fill it equally in 3 1/2 gallon containers. How many containers can he fill?

Margarita [4]

7.14 containers ≈7 containers are required to fill gallons containers equally for 25 gallons of gas

Given that Tom has 25 gallons of gas and needs to fill it equally in 3 $\frac{1}{2}$ gallons containers and asked how many gallons containers are required to fill equally.

25 gallons gas are required too put in 3 $\frac{1}{2}$ gallons containers.

As a result, Divide 25 with 3 $\frac{1}{2}$ to get how many containers are required to fill equality.

⇒ $\frac{25}{3\frac{1}{2} }$

⇒ $\frac{50}{7}$

⇒7.14 gallons containers ≈7 gallons containers

Therefore,7.14 gallons containers ≈7 gallons containers are required to fill gallons containers equally for 25 gallons of gas

Learn more about gallons here:

brainly.com/question/9917229

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5 0

2 years ago