It depends on your fuel economy, how much fuel the car burns per 100 miles etc.
30000L is larger than 3kL
The answer is Yes, no, yes, no
5x² + |x+1| > 0
5x² + x + 1 > 0
x+1 > 0 because it came from absolute
5x² > 0 because it’s squared
When you try a number you should put it in the original equality
5x² + |x+1|