the first car costs $90 to rent, and because of its fuel consumption rate, there's an additional cost of $0.50 per kilometers driven. How much is it for 500 kilometers

It would be $340 (with rental cost)

Without the rental cost it would be $250

Step-by-step explanation:

You have to multiply $0.50 with 500 since you drove 500 kilometers. That gives you $250. When you add the $90 to rent, you get $340.

Equation: 90 +.05k

k = kilometers