If you're a maffs person please assist me

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.

Witch represents the inverse of the function f(x)=1/4x-12

What is the unit rate of, 75% high fiber chimp food to 25% high protein chimp food.