Which modern-day nation did the inca empire fail to conquer any part of?

Brazil.

Explanation:

The Inca Empire, which name means Four Regions in Quechua, was the greatest empire in pre-Columbian America. It used conquering and nonviolent assimilation, to incorporate Peru, western and south central Bolivia, southwest Ecuador, a big part of Chile, northwest Argentina, and a small portion of southwest Colombia.  

well first we can compare on what the slave masters ate and what the slaves ate well the masters ate fancy great food like chicken rice mash potatose and stuff like that and slaves ate well food that your not suppost to eat like the weird parts of turkey and chicken and slaves master chilled beat and eat and slaves work get beat and get little of sleep there you go