A recipe calls for 18 cups of flour and 12 cups of raisins. Samantha wants to make one-third of the recipe. How many cups of flour and raisins will she need?

36x2 + 49y2 = 1,764 the foci are located at: (-√13, 0) and (√13,0) (0, -√13) and (0,√13) (-1, 0) and (1, 0)edit: the answer is (- the square root of 13, 0) and (the square root of 13, 0)