Which one is not correct with right triangle ABC with angle B=90 degree

What is the solution to the equation in the & show work i’m very

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

Ofin . (2,4) (2,1) a. y= 2 b. x= 2 c. x= -2 d. y= 2x