Final answer:
The inequality representing the possible values for the number of hours washing cars (w) and landscaping (L) Mackenzie can work is w + L ≥ 17.
Step-by-step explanation:
Mackenzie is working two summer jobs, and she needs to determine the possible number of hours she can work at each job while ensuring she works at least 17 hours in total. The hours spent washing cars are represented by w, and the hours spent landscaping is represented by L. The inequality representing this situation is w + L ≥ 17. This inequality means that the number of hours spent washing cars plus the number of hours spent landscaping must be at least 17 hours a week.