Answer:
So, Plane ABC and plane BCE _may_ be the same plane.
Step-by-step explanation:
This happens when E is on Plane ABC (or you could say, A is on Plane BCE). If not, then they are two different planes.
In plain and short, we simply divide 5 by (1+2+3) and then distribute the pieces likewise

add the ratios up, and you'll get 5.
Let's say the point is C, so C partitions AB into two pieces, where AC is at a ratio of 3 and CB is at a ratio of 7, thus 3:7,

(9,-4) you have to plugin 9 to the equation in the form of x. Then you add 5 and that would be your y value
The correct answer would be
C. All Real Numbers