You purchase 20 dozen roses and 15 dozen carnations at a cost of $504 for your school student council to use as a Valentine fundraiser. You package them together into bouquets of 2 roses for $5.00 or 3 carnations for $3.00. Altogether your student council sold 251 bouquets for a total of $989.00. Let x = number of rose bouquets sold Let y = number of carnation bouquets sold Which of the following systems models the above situation? Group of answer choices x + y = 989 and 5x + 3y = 251 x + y = 251 and 20x + 15y = 989 x + y = 251 and 5x + 3y = 989 x + y = 251 and 20x + 15y = 504