Yes, it is because a subjunctive mood can be a command and if you are telling someone to fix something, that is you giving them a command. So yes, fix that is a subjunctive mood.
Hope this helps! :)
Setting, values, customs, and lifestyles
1) went
2)rained
3)was
4)entertained-sat-gazed
5)got-saw-let
6)ever/saw
7)set
8)walked-heard-wore
9)saw-stood-made
10)traveled-spotted
11)drew-found
12)not only/visited-also/made
HOPE THIS HELPS:)
Answer: to portray Huck’s father as uneducated and ignorant.
In this excerpt, Twain most likely uses humour to highlight the absurdity of the father's sentiment. This is done in order to portray Huck's father as uneducated and ignorant. The father tells Huck that he does not see the importance of school. Moreover, he thinks school is damaging because it will teach Huck to feel superior to his dad, who is unlikely to have attended school.