A florist is creating 10 centerpieces for the tables at a wedding reception. Roses cost $2.50 each, lilies cost $4 each, and irises cost $2 each. The customer has a budget of $440 allocated for the centerpieces and wants each centerpiece to contain 18 flowers, with twice as many roses as the number of irises and lilies combined. (Let r represent the number of roses, l represent the number of lilies, and i represent the number irises. ) (a) Write a system of linear equations that represents the situation. = 180 = 440 = 0