Answer:
Step-by-step explanation:
let <em>t = </em>total, <em>p = origional price.</em>
tax<em>= p(.09) </em>
t+tax= final price.
Assuming that Jeremy spent the entire $100 on the party supplies, here's the breakdown:
$100 - $30 = $70 remaining.
$70 - $10 = $60 remaining.
If he spent $60 on ten hats, and each hat was the same price, then each hat would have cost:

The equation is as follows:

Each hat was $6