Answer:
2x+9 when x equals 3 is 2*3+9
=15
Explanation:

By people sailing or drifting from southeast Asia
We would have more money in our pockets.
The rivers start from the mountains or hills.
Answer:
The geosphere includes the rocks and minerals on Earth from the molten rock and heavy metals in the deep interior of the planet to the sand on beaches and peaks of mountains. For example Sedimentary rocks, Igneous rocks, and Metamorphic rocks. Rate! Confirming this answer as correct.