Answer: 9 hours
Step-by-step explanation:
The inequality that shows the minimum number of hours, n, that Angela should work as a babysitter to earn enough to buy a series of books is:
4n + 24 ≥ 60
Step-by-step explanation:
4n represents the amount of money Angela earns as a babysitter for n hours.
24 is the amount of money Angela already has saved.
The sum of these two amounts (4n + 24) must be greater than or equal to the cost of the books, which is $60.
Simplifying the inequality:
4n + 24 ≥ 60
4n ≥ 36
n ≥ 9
Therefore, the minimum number of hours Angela should work as a babysitter to earn enough to buy a series of books is 9.