Final answer:
To find the possible numbers of hours Trey could trim trees, set up an inequality based on the given information. The inequality to earn more than $39 is 6t - 9 > 39. Therefore, Trey could trim trees for any value greater than 8 hours.
Step-by-step explanation:
To find the possible numbers of hours Trey could trim trees, we need to set up an inequality based on the given information. Trey charges $6 per hour and pays $9 in equipment fees. Let's assume he works t number of hours. The total amount he earns can be calculated as 6t, and the total amount he pays for equipment fees can be represented as 9. To earn more than $39, the inequality will be:
6t - 9 > 39
Simplifying the inequality, we get:
6t > 48
To solve for t, divide both sides of the inequality by 6:
t > 8
Therefore, the possible numbers of hours Trey could trim trees are any value greater than 8, as long as he charges $6 per hour and pays $9 in equipment fees.