Kiran says, “I bought 2.5 pounds of red and yellow lentils. Both were $1.80 per pound. I spent a total of $4.05.” 1. Write a system of equations to describe the relationships between the quantities in Kiran's statement. Be sure to specify what each variable represents.

2. Elena says, “That can't be right.” Explain how Elena can tell that something is wrong with Kiran's statement.