Which equations support the fact that rational numbers are closed under subtraction? Select each correct answer.

Secant be and cf intersect at point d inside a what is the measure of cde

Which ordered pair is a solution of the equation? 2x+3y=10

Asource of laser light sends rays ab and ac toward two opposite walls of a hall. the light rays strike the walls at points b and c, as shown below: what is the distance between the walls?