Answer:
To represent Melanie's age, we need to consider that she is 3 years younger than half of Emily's age, represented by x.
1. We start by taking half of Emily's age: 1/2 x.
2. Then, we subtract 3 years from half of Emily's age: 1/2 x - 3.
Therefore, the expression that represents Melanie's age is B) 1/2 x - 3.
Explanation: