The first one is "unit of account".
The second one is "store of value".
The third one is "medium of exchange".
Answer:
3 √5
Step-by-step explanation:
Answer:

Step-by-step explanation:
Given:
The system of equations given are:

Plug in
in the first equation and solve for
.

Therefore, the solution is 
1: x divided 7. 2: 10 + x. 3: x - 14. 4: 8x
Answer:
6 liters
Step-by-step explanation: