I don't know exactly which three but these could be some...
Studying local native traditions and life ways in order to become familiar with the local region
Local ecology
Observation: reading the landscape
Animals: tracking, hunting, trapping, making bow and arrows, animal food preparation
Identifying, harvesting and preparing wild edible plants
Fire making
Tool Making and flint knapping
Creating fishing equipment (hooks, lines, etc.), fishing, gutting and preparing fish for cooking
Shelter: building using local materials found at the site
The waste stream: where to excrete
Invisible structures: tribal culture and local tribal custom
Hope this helped!
Answer:

Explanation:
The equation is:

To get rid of the denominator, multiply both sides by 3. Then you have:

To get x alone on one side, add 2 to both sides. Then you have:

Answer:
The two rift valleys lined by mountains and plateaus.
Explanation:
The two rift valleys lined by mountains and plateaus.
Answer: After the hurricane, Galveston raised the elevation of many new buildings by more than 10 feet (3 meters). The city also built an extensive seawall to act as a buffer against future storms. Despite the reconstruction, the city's status as the premier shipping port was lost to Houston a few years after the disaster. Ike, however, is projected to head west on a path that will take it close to Hispaniola, Cuba, and the Florida Straits.”
Explanation: