Final answer:
After calculating the total cost for both Avis and Enterprise rental options, it is determined that Avis will cost Kyree $132.25 while Enterprise will cost $182.50 for a 215-mile trip, making Avis the more economical choice.
Step-by-step explanation:
To determine which rental car deal will save Kyree money for his trip to Washington DC, we need to calculate the total cost of each option for the 215-mile drive. For Avis, the cost is a $100 flat rate plus $0.15 per mile. For Enterprise, it's a $75 flat rate plus $0.50 per mile.
The total cost using Avis is $100 + (215 miles * $0.15/mile) = $100 + $32.25 = $132.25. The total cost using Enterprise is $75 + (215 miles * $0.50/mile) = $75 + $107.50 = $182.50.