Jim’s football team started a play on the 50 yard line. On the first play, the team had a 7-yard gain. On the second play, they lost 10 yards. What yard line was the ball on at the end of the second play?

This is a basic addition/subtraction question. It's saying that they started at the 50 yard line. On the play, they gained 7 yards. So, we'll add 50+7 = 57.They're at the 57 yard line at this point. On the second play they lost 10 yards (how unfortunate). Thereby, we will subtract 57-10=47.50 yards +7 yards. -10 yards.The answer will be that they'll be on the 47 yard line on the next play.