Final answer:
Arianna can buy a maximum of 5 boxes of cereal. Correct option is a.
Step-by-step explanation:
To determine how many boxes of cereal Arianna can buy, we need to set up an inequality. Let 'b' represent the number of boxes. Arianna has $17 and she needs to have $2 left over for the bus ride home.
The price per box, including tax, is $3. So the total cost of 'b' boxes of cereal is 3b. Arianna's total expenses will be 3b + 2 (including tax and bus fare).
To find the maximum number of boxes Arianna can buy, we need to find the largest 'b' that satisfies the inequality: 3b + 2 ≤ 17.
Simplifying the inequality, we have 3b ≤ 15. Dividing both sides by 3, we get b ≤ 5.
Therefore, Arianna can buy a maximum of 5 boxes of cereal.