Answer:
Nocomplanar? Right because they’re not all in the same place?
Step-by-step explanation:
Only the third one makes x=-1 true
Answer:
i d k
Step-by-step explanation:

The respective terms used for the lines are ~
Answer:
678
Step-by-step explanation:
First you have to do 666-66 which is 600. Then you add 777 which is 1377. Then you add 90 which is 1467. Last you subtract 789.