The graph of y=g(x) is shown. Draw the graph of =y−2g(x)-1

Measures of the angle of r, 31 s (x+4) t (3x+9)

Can someone check if i did this correct. it’s number 4 if you’re wondering.

1) in triangle the, what is the measure of angle t (in degrees)? 2) in triangle bat, the measure of angle b is 66∘, and the measure of angle t is 77∘.what is the measure of the exterior angle at a (in degrees)?