pamelawuzhere pamelawuzhere

07-03-2020
Mathematics

contestada

x2 + y2 - 20x +14y + 28 = 0 is a circle. What is the radius of this circle?

Respuesta :

lazirlufias lazirlufias

07-03-2020

Answer:

11

Step-by-step explanation:

observe the equation equivalent to

x² – 20x + 100 + y² + 14y + 49 = 121

(x–10)² + (y+7)² = 11²

so the circle has radius 11

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