Part A: To write a linear equation that represents the total number of hair ties (h) based on the number of days that have passed (d), we can start with the initial number of hair ties stolen and then add the daily amount stolen.
Tommy starts with 5 hair ties and steals 3 more each day. The equation can be written as:
\[ h(d) = 3d + 5 \]
Part B: To find out how many hair ties Tommy would have stolen after 9 days, we can substitute \( d = 9 \) into the equation:
\[ h(9) = 3(9) + 5 \]
Calculating that gives:
\[ h(9) = 27 + 5 = 32 \]
Therefore, Tommy would have stolen 32 hair ties after 9 days.