What is the store paid $75 for a clarinet and sold it for $100 did the store mark up the price by 30% what the answer

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.

Graph the equationy=x^2 -[tex]y = x^{2} - 2[/tex]

If f(x)=3 over x+2 - square root x-3 then f(7)=