Let's start by reviewing a few of the key words used in this exercise.
Expenses: Money spent to run the business.
Revenue: All the money earned at the business.
Profit: The revenue minus any of the expenses (actual money we get to keep).
We start a business and in the first month we want to make a profit of at least $250. This means that the profit has to be greater than or equal to $250.
Profit ≥ 250
Let x be the revenue. Recall that the profit can be found by subtracting the expenses from the revenue. We are told that the expenses of the first month are $155. Knowing this, we can rewrite our inequality.
x-155 ≥ 250
Let's solve this inequality!
