To represent how much money Judy will have in total after saving for \( d \) days, we can start with the amount of money she currently has and then add the amount she saves over that period.
Judy starts with $100 and saves $5 per day. Therefore, after \( d \) days, she will have:
\[ \text{Total money Judy has} = 100 + 5d \]
So the equation representing how much money Judy will have in total after saving for \( d \) days is:
\[ T_J = 100 + 5d \]
where \( T_J \) is the total amount of money Judy has after \( d \) days.