Answer:
C) Between 9 and 13
Step-by-step explanation:
If 40% is 5 gallons, then 20% is 2.5 gallons
If you multiply both by 5, you get 12.5, which is between 9 and 13
Sorry for my weird way of math
Answer:
The last choice.
Step-by-step explanation:

The value of k must be restricted from being one that makes the original denominator zero. Hence k ≠ -1 or 5.
Answer:
57.4
Step-by-step explanation:
82.4 - 25 is too easy, a calculator can solve this.