Afootball team gained 6 yards on a first down, lost 15 yards on the second down, and gained 12 yards on the third down. how many yards do they need to gain on the fourth down to have a 10 yard gain from their starting position?

They need to earn 7 yards on the fourth down to have a 10 yard gain from their starting position

Step-by-step explanation:

To gain a new set of downs, a football team has four downs(tries) to gain 10 net yards, in total.

Gained 6 yards on first down

Net of 6 yards gained

Needs 10-6 = 4 yards

Lost 15 yards on second down

6 - 15 = -9

In all, they have lost 9 yards, so they need

4 + 15 = 19 yards

Gained 12 yards on third down

-9 + 12 = 3 net yards(need 10)

19 - 12 = 7

They need to earn 7 yards on the fourth down to have a 10 yard gain from their starting position

inverse operation of addition

answer: the answer is 110