How to slove this one?

Find the value of tan theta if sin theta = 12/13 and theta is in quadrant 2

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

Atriangle has verticals at b(-3,0), c(2,-1), d(-1,2). which transformation would produce an image with verticals b”(-2,1), c”(3,2), d”(0,-1)?