Final answer:
The subtraction expression to represent the situation where Jessica's score was -3 and Bryan scored 6 is 6 - (-3).
Step-by-step explanation:
To represent the situation where Jessica's score was -3 and Bryan scored 6, we need to subtract Jessica's score (-3) from Bryan's score (6). This can be represented by the subtraction expression 6 - (-3). When subtracting a negative number, we can change the sign of the negative number and then follow the addition rules. So, the answer would be 6 + 3, which is equal to 9. Therefore, the correct subtraction expression is option b) 6 - (-3).