Answer:
The possible number of bars Pam can sell to reach the goal must be at least 5 bars.
Explanation;
Let the remaining number of bars Pam can sell to reach the goal be "x"
If Pam sells 3 bars on Monday and 4 bars on Tuesday, the total number of bars sold will be 3 + 4 = 7bars
Also if each student is encouraged to sell at least 12 chocolate bars, the required inequality expression to solve will be:
[tex]\begin{gathered} 4+3+x\ge12 \\ 7+x\ge12 \\ x\ge12-7 \\ x\ge5 \\ \end{gathered}[/tex]This shows that the possible number of bars Pam can sell to reach the goal must be at least 5 bars.