Can any body give answers

What is the solution to the system of equations? (–2, –8) (–1, –5) (0, –2) (2, 4)

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?

How is the equation of this circle written in standard form? x2 + y2 - 6x + 14y = 142 a) (x - 3)2 + (y + 7)2 = 200 b) (x+ 3)2 + (y - 7)2 = 200 (x - 6)2 + (y + 14)2 = 142 d) (x+6)2 + (y- 14)2 = 142