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Ilia_Sergeevich [38]
3 years ago
7

What is the equation of a circle with its center at (5,-2) and a radius of 3? A (x – 5)2 + (y + 2)2 = 3 B (x - 5)2 + (y + 2)2 =

9 C (x + 5)2 + (y – 2)2 = 3 D (x + 5)2 + (y - 2)2 = 9​
Mathematics
1 answer:
lina2011 [118]3 years ago
4 0

Answer:

please forgive I want the points for my exam

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Answer:oh okay

Step-by-step explanation:

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3 years ago
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dusya [7]

1)

(-2+\sqrt{-5})^2\implies (-2+\sqrt{-1\cdot 5})^2\implies (-2+\sqrt{-1}\sqrt{5})^2\implies (-2+i\sqrt{5})^2 \\\\\\ (-2+i\sqrt{5})(-2+i\sqrt{5})\implies +4-2i\sqrt{5}-2i\sqrt{5}+(i\sqrt{5})^2 \\\\\\ 4-4i\sqrt{5}+[i^2(\sqrt{5})^2]\implies 4-4i\sqrt{5}+[-1\cdot 5] \\\\\\ 4-4i\sqrt{5}-5\implies -1-4i\sqrt{5}

3)

let's recall that the conjugate of any pair a + b is simply the same pair with a different sign, namely a - b and the reverse is also true, let's also recall that i² = -1.

\cfrac{6-7i}{1-2i}\implies \stackrel{\textit{multiplying both sides by the denominator's conjugate}}{\cfrac{6-7i}{1-2i}\cdot \cfrac{1+2i}{1+2i}\implies \cfrac{(6-7i)(1+2i)}{\underset{\textit{difference of squares}}{(1-2i)(1+2i)}}} \\\\\\ \cfrac{(6-7i)(1+2i)}{1^2-(2i)^2}\implies \cfrac{6-12i-7i-14i^2}{1-(2^2i^2)}\implies \cfrac{6-19i-14(-1)}{1-[4(-1)]} \\\\\\ \cfrac{6-19i+14}{1-(-4)}\implies \cfrac{20-19i}{1+4}\implies \cfrac{20-19i}{5}\implies \cfrac{20}{5}-\cfrac{19i}{5}\implies 4-\cfrac{19i}{5}

7 0
3 years ago
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divide it two numbers to get 11.090909 which would most likely to be 11.10

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Answer:

y=2/3x-1 is 3/2

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Step-by-step explanation:

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solmaris [256]

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D. y=5x+2

Step-by-step explanation:

The y int. is 2, and the slope is 5/1. If you plug that into a calculator, you can see the slope being steep.

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