What property is used to expand 3(5 - 2x) to 15 - 6x?

1.associative property
2.the distributive property

In the diagram below, tan θ = sqrt 3. what is the value of m?

How do you find principle and simple interest

1) what is the measure of the exterior angle, ∠uvw ? 2) in triangle man, what is the measure of the exterior angle at n (in degrees)?