Answer:
48 ounces of seltzer water
Explanation:
From the question, we are told that:
Rafiq is making a fruit punch using 48 ounces of grape juice and some seltzer water.
He wants to make 10 equal servings that are at least 9 ounces each.
The total number of ounces that he want so have is at least
= 10 × 9 ounces = 90 ounces
Should he add 32 ounces of seltzer water or 48 ounces of seltzer water?
Let the number of ounces of seltzer water that he wants to add = x
At least = More than or equal to which is represented by inequality sign = ≥
Hence:
48 ounces of grape juice + x ounces of seltzer water ≥ 90 ounces
48 + x ≥ 90
x ≥ 90 - 48
x ≥ 42 ounces of seltzer water
From this calculation, the least amount of seltzer water he can add is 42 ounces.
Therefore, Rafiq should add 48 ounces of seltzer water