The triangular region shows the number of possible carrots, x, and the number of possible potatoes, y, a chef can use in a recipe. Which combination of carrots and potatoes can the chef use? Select each correct answer.

45 carrots and 21 potatoes
25 carrots and 25 potatoes
40 carrots and 25 potatoes
30 carrots and 25 potatoes
35 carrots and 15 potatoes
20 carrots and 40 potatoes