4 can hold 8 gallons = 8/4 = 2 big bottle per gallons.
For 10 big bottles = 10 x 2 = 20 gallons.
If you are looking for how many bottles can be filled with 10 gallons, the answer is 5.
2x+9<0
This is asking for numbers below 0
x>-12
This is asking for numbers above - 12
So the numbers which would fit in both of these rules would be:
-11, -10, -9, -8, -7, -6, -5
Any numbers above or below these wouldn't fit into any of the inequalities
The area is 113.1m If you want to double check go on google and look up surface area of a sphere. A calculator will come up. Hope this helped.
The simplified expression is
-7x + 7y - 2
Hope this helps! :D