Question

Each classmates contributes $2 for charity Write an expression for the amount of money raised by your class

Answer 1

2n
2 is there due to the fact that everyone is donating $2. n is for the number of people in the class.
E.g.
If there were 20 people in the class, you would substitute n for 20.
20 x 2 = $40

Answer 2

$2*S=A
S=Student
A=Total amount