Babyhands8249 Babyhands8249
  • 20-05-2020
  • Mathematics
contestada

The equation of a circle is x2+y2+10x−4y−20=0 .


What is the radius of the circle?


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osikbro
osikbro osikbro
  • 20-05-2020

Answer:

7

Step-by-step explanation:

Let's start by converting this to standard form.

[tex]x^2+10x+y^2-4y=20\\(x^2+10x+25)-25+(y^2-4y+4)-4=20\\(x+5)^2+(y-2)^2=49[/tex]

The center of the circle is at (-5,2), and the radius is [tex]\sqrt{49}=7[/tex] units. Hope this helps!

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Sabrina0336 Sabrina0336
  • 07-04-2022

Answer:

Here is the correct answer! Hope I helped! Sorry I am late! Really helpful for k12 users!

Step-by-step explanation:

Ver imagen Sabrina0336
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