Question

Janie receives an allowance of $3 per week. In addition, she can earn $2 for each chore she does. This week, she wants to earn enough money to buy a CD for $13. Janie can do fractions of chores.

Write an inequality to determine the number of chores, cc, Janie must do this week to earn enough money to buy a CD.

Answer 1

n ≥ 5

Explanation:

The money that Janie earns (E) must be greater than or equal to the cost (c) of the CD.

In symbols,

E ≥ c

2n + 3 ≥ 13 Subtract 2 from each side

2n ≥ 10 Divide each side by 2

n ≥ 5

Janie must do five or more chores to buy the CD.