Final answer:
The salesman's monthly salary is calculated by the formula Salary = $750 + $75m, where m is the number of cars sold. Therefore, the salary for the month of February depends on the value of m, the number of cars sold.
Step-by-step explanation:
To calculate the used car salesman's salary for the month of February, we can set up an equation using the given information. The salesman has a fixed monthly salary of $750 and earns an additional $75 for every car sold. If the salesman sells m cars, his total salary will be the sum of his fixed salary and the commission for the m cars sold.
The formula to calculate the salesman's monthly salary is:
Salary = Fixed Salary + (Commission per Car × Number of Cars Sold)
Substituting the given values into the formula:
Salary = $750 + ($75 × m)
Therefore, if the salesman sells m cars in February, his salary for that month will be:
Salary = $750 + $75m