Which value from the set ( 6,7,8,9) makes 3r +2= r + 9•2 true ?

Ineed with what i should write for my research paper. my topic is history of slavery. 1800 words. all i need is what to write in each paragraphs. like when the research paper has titles for each paragraph and it explains the tile in each paragraph. for example when did slaverh begin? why did it begin like an outline.

What anti-semitic policies enforced by the nazi party

According to this passage, what can be expected of people appointed as judges temporarily?