19 Given the following three sequences: I. 2, 4, 6, 8, 10... II. 2, 4, 8, 16, 32... III. a, a + 2, a + 4, a + 6, a + 8... Which ones are arithmetic sequences? (1) I and II, only (3) II and III only (2) I and III, only (4) I, II, and III​

Un used xx milliliters, or 90\%90%, of his favorite bottle of hot sauce. which of the following expressions could represent the volume of a full bottle of jun's favorite hot sauce, in milliliters? choose 2 answers: choose 2 answers: (choice a) a \dfrac{x}{0.9} 0.9 x (choice b) b \dfrac{10}{9}x 9 10 x (choice c) c 0.9x0.9x (choice d) d xx (choice e) e x+0.1x+0.1