Question

Janie has
\[\$3\]. She earns
\[\$1.20\] for each chore she does and can do fractions of chores. She wants to earn enough money to buy a CD for
\[\$13.50\].
Write an inequality to determine the number of chores,
\[c\], Janie could do to have enough money to buy the CD.

Answer 1

Let c be the number of chores. The inequality is
3 + 1.20c ≥ 13.50.

Solving: 1.20c ≥ 10.50, so c ≥ 10.50/1.20 = 8.75.

She must do at least 8.75 chores (so 9 full chores, or 8.75 if fractional chores are allowed).