Final answer:
Palisades Park High School gained a total of 5 yards over the first three plays against Ridgefield High School, after summing their gains and subtracting their loss.
Step-by-step explanation:
In calculating the total yards gained or lost by Palisades Park High School during their football game against Ridgefield High School, we start by adding the yards gained on the first two plays: 6 yards and 8 yards, which gives us a total of 14 yards gained. However, on the next play, they lost 9 yards. To find the overall yardage, we subtract the yards lost from the yards gained: 14 yards - 9 yards, resulting in a total of 5 yards gained over the first three plays.