We need to write an inequality to express the number of points that Deborah's team earns in one round.
Since each player can score up to 10 points, and this team has 5 players (Deborah and four of her friends), the points x that this team earns satisfy the following:
x ≤ 10 + 10 + 10 + 10 + 10 (a maximum of 10 for each player)
x ≤ 50
Now, we need to write an expression to represent the number of points this team earns if each player misses one point.
Since each of the players can score up to 10 points, if each of them misses one point, each one will score 9 points (assuming that "missing one point" means the player will score all the other possible points).
Thus, the number of points the team earns, in this case, is given by the expression:
9+9+9+9+9
The number of players i