A teacher wants to buy 9 boxes of granola bars for a school trip. Each box usually
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(7βx). In this expression, what does the quantity 7βx represent? The teacher has $36 to spend on the granola bars. The equation 9(7βx)=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(7βx) representing this situation. The solution to this inequality must either look like x3 or x3. Which do you think it is? Explain your reasoning.