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suter [353]
3 years ago
8

Which equation shows how the relationship between the circumference and the diameter of a circle is equivalent to π?

Mathematics
1 answer:
Natalija [7]3 years ago
3 0

Answer:

The answer to your question is: I think is letter C

Step-by-step explanation:

Formula of circumference

                                           C = 2πr

where

C = circumference

r = radius

d = diameter

and

r = d/2

then

                                        C = 2 π d/2

                                        C = πd

                                        π = C/d     It is a division

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In a game, 3 people are chosen in the first round. Each of those people chooses 3 people in the second round and so on. How many
tatiyna

Answer:

729 people chosen

Step-by-step explanation:

4 calculations in head when 3^2 = 9

3 calculations in head when 3^3 = 27

2 calculations in head when 3^4 = 81

1 calculations in head when 3^5 = 243

Answer found 3^6 = 729.

3  = 1st       = 3^1

9  = 2nd    = 3^2         3(3)

27  = 3rd   = 3^3         9(3)

81  = 4th    = 3^4        27(3)

243 = 5th  = 3^5       81(3)

729 = 6th = 3^6        243(3)

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3 years ago
In a certain city the cost for a taxi ride for 20 miles is $13. For 30 miles the cost is $18. Assuming the number of miles is x
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We need to write the linear equation that is satisfied by (20,13) and (30,18).
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                              30 - 20            10

We need to find the y-intercept of this function.  To do that, start with the slope-intercept form   y = mx + b

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$13 = ($0.50/mile)(20 miles) + b

Then $13 = $10 + b, and b = $3.

There's an up-front charge of $3 just to step into the taxi.

The equation in question is y = ($0.50/mile)x + $3.00           (answer)
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Answer: 20:45

I hope this helped!

<!> Brainliest is appreciated! <!>

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Interval is 0, 2pi) 4 sin^2x-4 sin x + 1 = 0
svetoff [14.1K]

Answer:

\large\boxed{x=\dfrac{\pi}{6}\ \vee\ x=\dfrac{5\pi}{6}}

Step-by-step explanation:

4\sin^2x-4\sin x+1=0\\\\2^2\sin^2x-2(2\sin x)(1)+1^2=0\\\\(2\sin x)^2-2(2\sin x)(1)+1^2=0\qquad\text{use}\ (a-b)^2=a^2-2ab+b^2\\\\(2\sin x-1)^2=0\iff2\ain x-1=0\qquad\text{add 1 to both sides}\\\\2\sin x=1\qquad\text{divide both sides by 2}\\\\\sin x=\dfrac{1}{2}\to x=\dfrac{\pi}{6}\ \vee\ x=\dfrac{5\pi}{6}

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