I think it’s 0 bc it’s the only one that isn’t negative
D. (y-3)
I'm assuming that they want you to find the factors of the quadratic expression, which are (y-5)(y-3). (y-5) isn't up there, so (y-3) is the only solution that's really possible.
Angle bisector divides the angle in half so one half equals the other half
(2x+12) = (4x+8)
2x + 4 = 4x
4 = 2x
2 = x
2(2) + 12 = 16
angle QRT is 16 degrees