The latest online craze is a new game, Khan on Seven. You get 100100100 points for playing the game. In addition, you get 505050
points for each seven-letter word you make with the ten letters you receive. Sal wants to break the record, and he needs 18{,}00018,00018, comma, 000 or more points to do so. Write an inequality to determine the number of seven-letter words, www, Sal could make to break the record.
Each seven-letter word is worth 50 points. words are then worth .
Since Sal gets 100 points for playing the game, his points total after words is . If he wants to break the record, he must get, at least, 18000 points. "At least" in inequality means (just as "at most" means ). Then the required inequality is
.
Note that the question says "18000 or more", which is why we used the symbol. If the phrase had been "more than 18000", we would have used .