Answer :
Answer:
well I think the question's not complete but if that's the question then 9 boxes would cost about $63 dollars. since some stores have a sale, you should add the word 'about' or 'around' with the answer. hope it was helpful ))
The minimum discount teacher will need to buy 9 boxes of granola bars for a school trip is 42.86%.
Complete 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.
Given to us
- Cost of a box of granola bars = $7
- Number of boxer teacher wants to buy = 9
- Budget of teacher = $36
Assumption
Let's assume that the discount teacher want is x, therefore, the teacher wants to buy a box of granola bars in (100-x) times the price.
The total cost of 9 boxes of granola bars
The total cost of 9 boxes of granola bars
= Number of boxes x Cost of a box of granola bars
= 9 x $7
= $63
Discount teacher will need
As we know the budget of teachers is only $36, the inequality can be written as,
[tex](100-x)\%\ of\ \$63 \leq \$36\\\\\dfrac{(100-x)}{100} \times 63 \leq 36\\\\(100-x) \leq \dfrac{36 \times 100}{63}\\\\(100-x)\leq 57.14 \\\\ -x \leq -42.86\%\\\\ x \geq 42.86\%[/tex]
Hence, the minimum discount teacher will need to buy 9 boxes of granola bars for a school trip is 42.86%.
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