Gary is baking pretzels for his sister's party. some pretzels will be regular and some pretzels will be whole grain. let x represent the number of dozens of regular pretzels. let y represent the number of dozens of whole grain pretzels. gary needs to bake at least 14 dozen pretzels in all. gary has 20 cups of flour. he needs 2 cups of flour for each batch of 12 whole grain pretzels, and 1 cup of flour for each batch of 12 regular pretzels. select the constraints that correctly model the inequality. x≤0 x≥0 y≤0 y≥0 x+2y≤20 x+2y≥20 x+y≥14