Kristy makes 5$ per hour babysitting and 12$ per hour giving music lessons. one weekend, she worked a total of 18 hours and made $139.00. how many hours did she spend babysitting? write your answer in complete sentences.

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.

Need this asap if anyone can i would be very grateful. if you could show workings that would really

Simplify. (-2)^-3 a. -8 b. -1/8 c. 1/8 d. 8