To model the situation with linear equations, we can define two variables:
- Let \( g \) represent the number of students receiving gift cards for excellent grades.
- Let \( a \) represent the number of students receiving gift cards for perfect attendance.
We know the following from the problem:
- The total number of students is 100.
- The total cost of the gift cards is $4,000.
Based on this information, we can write the following equations:
-
For the total number of students: \[ g + a = 100 \]
-
For the total cost of the gift cards: \[ 40g + 25a = 4000 \]
Thus, the pair of linear equations that model this situation is: \[ \begin{align*}
- & \quad g + a = 100 \
- & \quad 40g + 25a = 4000 \end{align*} \]