PLEASE HELP ME!

What is radiant energy? Give an example.

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.

Which of the following correctly justifies statement four of the two column proof? a. corresponding angles theorem b. transitive property of equality c. vertical angle theorem d. substitution property of equality

What is the image of c for a 90° counterclockwise rotation about a? (3, 7) (-1, 3) (7, 3)