Based on this information, which lines could be perpendicular to rs? select two options. line e a line e r line e f line f g line f s

Factor the expression using the gcf. the expression 21m−49n factored using the gcf

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?

In each diagram, line p is parallel to line f, and line t intersects lines p and f. based on the diagram, what is the value of x? ( provide explanation)