Final answer:
To find the amount of grape juice in the fruit punch, subtract the amount of apple juice added from the total amount of fruit punch. The amount of grape juice in the punch is 13/4 quarts.
Step-by-step explanation:
Part A: To find the amount of grape juice g in the punch, we need to subtract the amount of apple juice added from the total amount of fruit punch.
Let a represent the amount of apple juice.
Given that Evan adds 2 1/4 quarts of apple juice to make 5 1/2 quarts of fruit punch, we can write the equation: a + g = 5 1/2 = 11/2.
Part B: To find the amount of grape juice in the punch, we can substitute the value of a from part A into the equation.
Subtracting 2 1/4 quarts from 5 1/2 quarts, we get: 5 1/2 - 2 1/4 = 22/4 - 9/4 = 13/4
Therefore, there is 13/4 quarts of grape juice in the punch.