If you toss 10 fair coins, in how many ways can you obtain at least two tails?

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.

Write an equation in point-slope form for the line through the given point that has the given slope (-2,-7); m=-3/2

What effect would doubling all the dimensions of a triangular pyramid have on the volume of the pyramid? explain your reasoning.