Match the pairs of equations that represent concentric circles. Tiles 3x2 + 3y2 + 12x - 6y - 21 = 0 5x2 + 5y2 - 10x + 40y - 75 = 0 5x2 + 5y2 - 30x + 20y - 10 = 0 4x2 + 4y2 + 16x - 8y - 308 = 0 x2 + y2 - 12x - 8y - 100 = 0 2x2 + 2y2 - 8x + 12y - 40 = 0 4x2 + 4y2 - 16x + 24y - 28 = 0 3x2 + 3y2 - 18x + 12y - 81 = 0 x2 + y2 - 2x + 8y - 13 = 0 x2 + y2 + 24x + 30y + 17 = 0

Question

Mathematics

Kolten Townsend

11 September, 17:04

Match the pairs of equations that represent concentric circles. Tiles 3x2 + 3y2 + 12x - 6y - 21 = 0 5x2 + 5y2 - 10x + 40y - 75 = 0 5x2 + 5y2 - 30x + 20y - 10 = 0 4x2 + 4y2 + 16x - 8y - 308 = 0 x2 + y2 - 12x - 8y - 100 = 0 2x2 + 2y2 - 8x + 12y - 40 = 0 4x2 + 4y2 - 16x + 24y - 28 = 0 3x2 + 3y2 - 18x + 12y - 81 = 0 x2 + y2 - 2x + 8y - 13 = 0 x2 + y2 + 24x + 30y + 17 = 0

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Lorelei Choi · Answer 1

3x^2 + 3y^2 + 12x - 6y - 21 = 0 and 4x^2 + 4y^2 + 16x - 8y - 308 = 0 are concentric. 5x^2 + 5y^2 - 10x + 40y - 75 = 0 and x^2 + y^2 - 2x + 8y - 13 = 0 are concentric. 5x^2 + 5y^2 - 30x + 20y - 10 = 0 and 3x^2 + 3y^2 - 18x + 12y - 81 = 0 are concentric. 2x^2 + 2y^2 - 8x + 12y - 40 = 0 and 4x^2 + 4y^2 - 16x + 24y - 28 = 0 are concentric.