I will mark brainliest! Use the diagram and the given information to find the indicated measures. Picture is attached below

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.

What is the range? can’t seem to find it out

The square root of 9x plus 7 plus the square rot of 2x equall to 7