Answer: he needs to make at least 10 sales.
Step-by-step explanation:
Let x represent the number of sales that the salesman makes in a week.
As a salesman, Audrey earns $75 per week plus $5 per sale. This means that if he makes x sales in a week, his total earnings would be
5x + 75
This week, she wants her pay to be at least $125. Therefore, an inequality for the number of sales Audrey needs to make is
5x + 75 ≥ 125
5x ≥ 125 - 75
5x ≥ 50
x ≥ 50/5
x ≥ 10
