The supply curve for steel is 90x−y=−50. The demand curve is 10x+y=200.

x is quantity in thousands of metric tons

y is price in dollars per metric ton

What are the values for quantity and price at the intersection point of the two curves?

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