The library needs at least 15 people to sign up for an event in order to run it . Currently, 3 people have signed up , and the library expects 2 more more people . After how many days will the library be sure it can run the event ? Write an inequality
Let x be the number of days.
The number of people signed up after x days is 3 + 2x.
To ensure that at least 15 people have signed up, we set up the inequality:
3 + 2x ≥ 15
Subtracting 3 from both sides:
2x ≥ 12
Dividing both sides by 2:
x ≥ 6
Therefore, the library will be sure it can run the event after at least 6 days.