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2015 AMC 10BProblem 12P11-15~3 minPrint
Coordinate GeometryAbsolute Value & InequalitiesSet up the equation/formula and compute; no special trick needed

For how many integers xx is the point (x,−x)(x,-x) inside or on the circle of radius 1010 centered at (5,5)(5,5) ?

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Problem © Mathematical Association of America (MAA), American Mathematics Competitions. Reproduced for non-commercial educational use. Solution and commentary are original to this site.