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s344n2d4d5 [400]
3 years ago
14

Write an equation of the circle with center (5, -7) and radius 9.

Mathematics
1 answer:
vagabundo [1.1K]3 years ago
6 0

Answer:

(x - 5)² + (y + 7)² = 81

Step-by-step explanation:

The equation of a circle in standard form is

(x - h)² + (y - k)² = r²

where (h, k) are the coordinates of the centre and r is the radius

Here (h, k) = (5, - 7) and r = 9, thus

(x - 5)² + (y - (- 7))² = 9², that is

(x - 5)² + (y + 7)² = 81 ← equation of circle

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after 5 years

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The sample mean of the days of engineering conferences is 5.5.

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The given data says that values of X are the length in days.

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we have to find the sample mean for the days.

Mean = \frac{sum of all data}{number of samples}.

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