The probability of her winning a game would be 5/9 because if she loses 4/9 games then 5/9 games must be wins.
The seals final elevation is 9 feet below sea level.
The expression would be > 0.
Subtracting a negative is the same as adding a positive; therefore -18--18 = -18+18 = 0. Since we know that x>-18, 0 is below anything we could get from this.