Taking gf applications?

5x−4≥12 or 12x+5≤−4 can you with this problem

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

Perform the indicated operation and write the answer in the form a + bi. (-5 + 2) + (3 - 6i)