Arcola bought 8 virtual reality headsets for $400 each and 8 laptops for $500 each. How much total money did Arcola spend?

Which is a true statement about an exterior angle of a triangle a. it is formed by two segments that are not sides of the triangle, b. it forms a linear pair with one of the interior angles of the triangle, c. it is complementary to one of the interior angles of the triangle. d. it is formed by two segments that are sides of the triangle.

Complete the solution of the equation. find the value of y when x equals -5. -4x - 8y = -52

With alll of except for the 2 that i did already