Final answer:
To determine the maximum distance you can travel with $20, divide the total amount of money you have by the cost per kilometer.
Step-by-step explanation:
To determine the maximum distance you can travel with $20, you need to first calculate the cost per kilometer. The ride costs $5 plus $2.50 per kilometer, so the cost per kilometer is $2.50. To find the maximum distance, divide the total amount of money you have ($20) by the cost per kilometer ($2.50).
$20 ÷ $2.50 = 8 kilometers
Therefore, the maximum distance you can travel with $20 is 8 kilometers.