So...lets first think about what the word means to actually determine its synonyms.
Subvert :- To overthrow, or take down
Since this refers to an action that is upsetting, that would best fit the synonym.
Answer; To upset
Answer: n = -2
Step-by-step explanation:
The answer should be X+6y=27
To find how many hours Sonia work on her science project,we can multiply the working hours of Tony by the times Sonia did:

Therefore Sonia work on her science project for 5 5/6 hours.
Hope it helps!