A teacher wants to buy 9 boxes of granola bars for a school trip. Each box usually costs $7, but many grocery stores are having a sale on granola bars this week. Different stores are selling boxes of granola bars at different discounts. If x represents the dollar amount of the discount, then the amount the teacher will pay can be expressed as 9(7−x). In this expression, what does the quantity 7−x represent? The teacher has $36 to spend on the granola bars. The equation 9(7−x)=36 represents a situation where she spends all $36. Solve this equation. What does the solution mean in this situation? The teacher does not have to spend all $36. Write an inequality relating 36 and 9(7−x) representing this situation. The solution to this inequality must either look like x3 or x3. Which do you think it is? Explain your reasoning.