SAT Question 7399c3b0: Nonlinear Equations In One Variable And Systems Of Equations In Two Variables answer and explanation with Desmos solution

Choice A is incorrect. This is the positive solution to the equation $k^2-53=20,683$, not $k^2-53=91$.

Choice B is incorrect. This is the positive solution to the equation $k^2-53=5,131$, not $k^2-53=91$.

Choice C is incorrect. This is the positive solution to the equation $k^2-53=1,391$, not $k^2-53=91$.