Car Rental Miles
1. **State the problem:** A car rental company charges 40000 per day plus 2000 per mile. A customer wants to spend not more than 1000 per day. We need to find how many miles the customer can drive to meet this budget.
2. **Identify variables:**
Let $m$ be the number of miles driven.
3. **Write the cost equation:**
Total cost = daily charge + (cost per mile × number of miles)
$$\text{Total cost} = 40000 + 2000m$$
4. **Set up inequality for the budget:**
Customer wants to spend at most 1000 per day, so:
$$40000 + 2000m \leq 1000$$
5. **Solve the inequality for $m$:**
Subtract 40000 from both sides:
$$2000m \leq 1000 - 40000$$
$$2000m \leq -39000$$
Divide both sides by 2000:
$$m \leq \frac{-39000}{2000} = -19.5$$
6. **Interpret the result:**
Miles driven $m$ cannot be negative. Since $m \leq -19.5$ is impossible in reality, the customer cannot drive any positive number of miles within a 1000 per day budget given these rates.
**Final answer:** The customer cannot drive any positive miles without exceeding the 1000 daily budget.