Please help! Ill give brianliest!

Which math sentence can be used to determine if the triangle is a right triangle?

Which expression is equivalent to 3^3 + 2^2?

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.