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jenyasd209 [6]
3 years ago
7

7

Mathematics
1 answer:
elixir [45]3 years ago
4 0

Answer: <em>the answer would be</em> <em>C</em>, 12.

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The radius of one circle is three the time radius of another circle. The sum of their areas is 12pi. Find the radius of each cir
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\displaystyle\\&#10;\begin{cases}&#10;R_1 = 3R_2\\&#10;\pi R_1^2 +\pi R_2^2=12\pi ~~~\Big|~~:\pi &#10;\end{cases} \\  \\ &#10;\begin{cases} &#10;R_1 = 3R_2\\&#10;R_1^2 + R_2^2=12 &#10;\end{cases} \\  \\ &#10;(3R_2)^2+ R_2^2=12 \\  \\ &#10;9R_2^2 + R_2^2=12 \\  \\ &#10;10R_2^2=12\\\\&#10;R_2^2 = \frac{12}{10} = \frac{6}{5}  \\  \\ &#10;R_2 =  \boxed{\sqrt{\frac{6}{5}} } \\  \\ &#10;R_1 = \boxed{3\sqrt{\frac{6}{5}} }



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3 years ago
What is <br> 4<br> 7<br> as a decimal rounded to 3 decimal places?
Sliva [168]

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3 years ago
For which value will the equation have only one solution:x=10​
iris [78.8K]

Answer:

I think its this

Step-by-step explanation:

x=380=2632≈26.6

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3 years ago
Simplify.<br> <img src="https://tex.z-dn.net/?f=%5Csqrt32%20%2B%20%5Csqrt16%2B%20%5Csqrt8" id="TexFormula1" title="\sqrt32 + \sq
svetoff [14.1K]

Answer:

4 + 6 \sqrt{2}

Step-by-step explanation:

\sqrt{32}  +  \sqrt{16}  +  \sqrt{8}

\sqrt{32}  =  \sqrt{4 \times 4 \times 2}  =  4\sqrt{2}

\sqrt{16}  =  \sqrt{4 \times 4}  = 4

\sqrt{8}  =  \sqrt{2 \times 2 \times 2}  = 2 \sqrt{2}

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2 years ago
A hemisphere of radius 7 sits on a horizontal plane. A cylinder stands with its axis vertical, the center of its base at the cen
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Answer: radius r = 5.72

Height h = 4.04

Step-by-step explanation: Please find the attached file for the solution

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3 years ago
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