Question

Arrange the circles (represented by their equations in general form) in ascending order of their radius lengths.
x2 + y2 − 2x + 2y − 1 = 0
x2 + y2 − 4x + 4y − 10 = 0
x2 + y2 − 8x − 6y − 20 = 0
4x2 + 4y2 + 16x + 24y − 40 = 0
5x2 + 5y2 − 20x + 30y + 40 = 0
2x2 + 2y2 − 28x − 32y − 8 = 0
x2 + y2 + 12x − 2y − 9 = 0

Answer 1

Wrong section.

Answer 2

Welcome to Os though.

Answer 3

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https://prezi.com/fs3hqdpcopic/an-unofficial-guide-to-openstudy/

Post ur question in math section:
http://openstudy.com/study#/groups/Mathematics

Answer 4

okay. thank you @agl202