Ineed with number 17 i don’t get it at alll

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)?

Identify the number as a rational or irrational.explain. 127

Use composition to determine if (x) or h(x) is the inverse of f(x) for the limited domain x2-1.