What is the sum of the series?

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

Vertical angles must check all that apply

If you were constructing a triangular frame, and you had wood in the length of 4inches, 4 inches, and 7 inches, would it make a triangle? would you be able to create a frame from these pieces of wood? yes or no. explain your mathematical thinking