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Tamiku [17]
3 years ago
7

Someone help me I don’t understand the circumference C=2TTr

Mathematics
1 answer:
Irina-Kira [14]3 years ago
4 0
You are being asked to make π the subject in

C=2πr \:

So divide both sides of the equation by
2r

That is

\frac{ C}{2r} = \frac{2πr}{2r}
The you have
\frac{ C}{2r} = \pi

or

\pi = \frac{ C}{2r}

I hope this is helpful?
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3 years ago
Quadratic equations w complex roots <br> x2 - 6x + 12 = 0
Dmitriy789 [7]

Answer:

x = 3 ± i \sqrt{3}

Step-by-step explanation:

Given

x² - 6x + 12 = 0 ( subtract 12 from both sides )

x² - 6x = - 12

Using the method of completing the square

add ( half the coefficient of the x- term )² to both sides

x² + 2(- 3)x + 9 = - 12 + 9

(x - 3)² = - 3 ( take the square root of both sides )

x - 3 = ± \sqrt{-3} = ± i \sqrt{3} ( add 3 to both sides )

x = 3 ± i \sqrt{3}

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3 years ago
Help me im stuck answer a b c and d please I don't know if they right
TEA [102]

Answer:

It’s b

Step-by-step explanation:

6 0
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RST stock has an annual dividend per share of $4.35 and a closing price per share of 39.50. What is the yield % for RST stock (t
Nostrana [21]

Step 1

Yield% = (annual dividend per share) / (closing price per share)

\begin{gathered} Yield\text{ \%}=\frac{\text{annual dividend per share}}{\text{closing price per share}} \\  \\ Yield\text{ \%}=\frac{4.35}{39.50} \\  \\ Yield\text{ \%}=\text{ 0.11} \end{gathered}

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1 year ago
Dave, Frank, and Kathy can process 1,300 catalog orders per day when all three of them are working. Dave and Frank can do 780 or
Natalija [7]
(1) x+y+z=1300
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(3) y+z=850 => z = 850 - y

Replace x and z with y in function (1)

780 - y + y + 850 - y = 1300
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Therefore, x = 780 - y = 780 - 330 = 450
z = 850 - y = 850 - 330 = 520

Dave can do 450 catalog orders per day
Frank can do 330 catalog orders per day
Kathy can do 520 catalog orders per day

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3 years ago
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