Simplify: m^2n^-4 • 3m^-3n^2

Which statements regarding the diagram are true? check all that apply.

Which statements about these triangles is true

Which of these equations, when solved, gives a different value of x than the other three? a9.1 = -0.2x + 10 b10 = 9.1 + 0.2x c10 – 0.2x = 9.1 d9.1 – 10 = 0.2x