Chambers Ayala
05/01/2024 · Elementary School
Determine the center and radius of the circle. Write your answers as simplified fractions or integers. \[ \left(x+\frac{2}{3}\right)^{2}+\left(y-\frac{6}{7}\right)^{2}=\frac{81}{4} \]
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Step-by-step Solution
To determine the center and radius of the circle given by the equation:
\[ \left(x+\frac{2}{3}\right)^{2}+\left(y-\frac{6}{7}\right)^{2}=\frac{81}{4} \]
we can compare it with the standard form of the equation of a circle:
\[ (x-h)^2 + (y-k)^2 = r^2 \]
where (h, k) is the center of the circle and r is the radius.
From the given equation, we can see that:
- h = -2/3
- k = 6/7
To find the radius, we take the square root of the right-hand side of the equation:
\[ r^2 = \frac{81}{4} \]
\[ r = \sqrt{\frac{81}{4}} \]
\[ r = \frac{\sqrt{81}}{\sqrt{4}} \]
\[ r = \frac{9}{2} \]
So, the center of the circle is at \((-2/3, 6/7)\) and the radius is \(9/2\).
Quick Answer
The center of the circle is at \((-2/3, 6/7)\) and the radius is \(9/2\).
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