X-5=-4 please help me

Which equations represents circles that have a diameter of 12 units and a center that lies on the y-axis? check all that apply

John bought 2 horses at rs 20000 each

Which of the following represents the zeros of f(x) = 6x3 − 31x2 + 4x + 5? −5, one third , one half 5, − one third , one half 5, one third , − one half 5, one third , one half