Question

Sarah has $40 in a piggy bank. She
wants to keep at least $20 in the
piggy bank, and takes out half of
a dollar each week for a soda. Write an inequality.

Answer 1

Let x be the number of weeks.

The amount of money Sarah has in the piggy bank after x weeks is $40 - ($0.50)x.

The inequality for the amount of money Sarah has in the piggy bank is:

$40 - ($0.50)x ≥ $20