If f(x) = 1/4x - 5 then find the value of f(12)

Angle xyz is formed by segments xy and yz on the coordinate grid below: a coordinate plane is shown. angle xyz has endpoints at 3 comma negative 1 and 6 negative 2 and 3 comma negative 3 and measures 36.87 degrees. angle xyz is rotated 270 degrees counterclockwise about the origin to form angle x′y′z′. which statement shows the measure of angle x′y′z′?

Atransformation t : (x,y) (x-5,y +3) the image of a(2,-1) is

I’m not good at math can i have ? ?