Answer: B At most 45 cakes
Explanation:
Given, 5x + 15 ≤ 240
⇒ x + 3 ≤ 48 [Dividing by 5 on both sides]
⇒ x ≤ 45 [Subtracting 3 from both sides]
that means the bakery makes less than or equal to 45 cakes. the most cakes they can make is 45. So they make at most 45 cakes a day