Câu 14. Cho tam giác , các điểm D và E lần lượt thuộc các cạnh AB và AC . Chứng minh rằng nếu DE // BC thì AD/AB=AE/AC

Cherie measures and records the lengths and sizes of the same style of a sandal found at a shoe store. which equation can be used to determine the approximate shoe size, s, for a foot length of x inches? s = x – 2 s = 2x – 10 s = x + 6 s = 2x + 4

Which is the completely factored from of xy^3-x^3y

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie