What is the solution for the system
6x+9y=21
4x-7y=-27

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

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.

The radius of a sphere is 3 inches. which represents the volume of the sphere?