Always
Anytime point A is on line BC, AB+BC=BC
Step-by-step explanation:
3×3×3=27.
hope this helps you.
It is greater than 5/7. 5/7<1, and sqrt(5)>2
Letting

, we get

and

, so we can parameterize the intersection by

where

.
Image attached.
2/5 plus 27/9 minus 0 equals 0