Answer:
He has to gain 2 yards
Explanation:
The gained yards are positive and the lost yards are negative.
If Kevin gained 5 yards and then lost 7 yards, we get:
+ 5 - 7 = - 2
It means that he is 2 yards behind its initial position. To get the team back to where they started, we need to add 2 yards because:
-2 + 2 = 0
Where 0 means that their team is at the initial position.
Since we add 2, he needs to gain 2 yards.
