A circle with the circumference 12 has an arc with a 48 degree central angle what is the length of the arc

Find the slope of the line that contains the following points. r(-2, 4), s(6, -2)

Which one ? is the answer and how to find this answer

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.