Which two elements together are equal to the amount of aluminum in the earths crust

Which of the following of the following sets of side lengths could not form a triangle?

Is the point (0, 8) on the x-axis or y-axis? how do you know?

If the endpoints of the diameter of a circle are (8, 6) and (2,0), what is the standard form equation of the circle? a) (x + 5)2 + (y + 3)2 = 18 (x + 5)2 + (y + 3)2 = 3.72 (x - 5)2 + (y - 3)2 = 18 d) (x - 5)2 + (y - 3)2 = 32