11.25. Because both segments are chords and the lines extending from the center are congruent, the chords are congruent. Also, that answer's the one that makes the most sense out of your options.
2x - y = -1
3x - 2y = 1
Multiply the first equation by -2
-4x + 2y = 2
Add the new equation to the second equation
-x = 3
x = -3
Plug -3 into the first equation
2 * -3 - y = -1
-6 - y = -1
-y = 5
y = -5