Answer: See explanation
Explanation:
Let the number of guests be represented by x.
The information given can then be used to generate an inequality that goes thus:
160 + 15x ≤ 520
15x ≤ 520 - 160
15x ≤ 360
x ≤ 360/15
x ≤ 24
The number of guests should be at most 24