Hawaiian volcanoes- Hualalai, Mauna Loa and Maune Kea.
Some of the activities are:
- fishing
- watching beautiful sites
- hiking
- kayaking
- dog sleds
and etc.
Nuclear fusion because the sun has massive gravity that squeeze hydrogen atoms together and fusing them into helium which releases energy
The answer is 2x+3 because the expression cannot be simplified any further because they do not share the same variable which is x