Suppose that y varies jointly with w and x and inversely with z and y = 400 when w = 10, x = 25, and z = 5. write the equation that models the relationship.

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