Idk how to do this im literally just learning it

What is the measure of the smallest angle in the diagram? 15 29 32 45

50 plz, given the system of equations, match the following items. x + 3 y = 5 x - 3 y = -1 a) x-determinant b) y-determinant c) system determinant match the following to the pictures below.

Which equation can be simplified to find the inverse of y = 2x2^2