Find angle X. Hypotonuse = 15ft., Opposite = 8ft.​

Could someone with number 1 and 2

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab

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