Let a=2018, we can rewrite the question into

substitute back a = 2018, obtained

well, there is something wrong here
Answer:
$39.20
Step-by-step explanation:
$49 * (1-.2) = $39.20
Answer:
5
Explanation:
1/4 of 12 = 3
2 + 3 = 5
The answer is D you need to compare all the gallons by year and how much they waste.