Are 2m-0.2(2m) and 8(m/5) equivalent and explain

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

Typically a point in a three dimensional cartesian coordinate system is represented by which of the following answers in the picture !

Sasha delivers newspapers to subscribers that live within a 4 block radius of her house. sasha's house is located at point (0, -1). points a, b, c, d, and e represent the houses of some of the subscribers to the newspaper. to which houses does sasha deliver newspapers?