Can someone please help me with this?

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

Find an equation for the linear function which has slope -10 and x-intercept -7

The cross-sectional areas of a right triangular prism and a right cylinder are congruent. the right triangular prism has a height of 6 units, and the right cylinder has a height of 6 units. which conclusion can be made from the given information? the volume of the triangular prism is half the volume of the cylinder. the volume of the triangular prism is twice the volume of the cylinder. the volume of the triangular prism is equal to the volume of the cylinder. the volume of the triangular prism is not equal to the volume of the cylinder.