Question

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, and different stores are selling boxes of granola bars at different discounts.

● This teacher can spend at most $36 on granola bars. Write and solve an inequality to represent the amount that the granola bars could be discounted so that this teacher can stay within his budget.

Answer 1

Answer:

The granola bars should be discounted by 3 or more dollars

Step-by-step explanation:

Let $x$ be the amount the box of granola bars is discounted.

Therefore, $9(7-x)\leq 36$

⇒  $7-x\leq 4$

⇒  $-x\leq -3$

⇒  $x\geq 3$

Therefore, the granola bars should be discounted by 3 or more dollars for the teacher to stay within his $36 budget.