What are the possible numbers of positive, negative, and complex zeros of f(x) = −x6 + x5 − x4 + 4x3 − 12x2 + 12?
positive: 4, 2, or 0; negative: 2 or 0; complex: 6, 4, 2, or 0
positive: 3 or 1; negative: 3 or 1; complex: 4, 2, or 0
positive: 2 or 0; negative: 2 or 0; complex: 6, 4, or 2
positive: 5, 3, or 1; negative: 1; complex: 4, 2, or 0

How do you use the elimination method for this question? explain, because i really want to understand!

Martha has a deck of cards. she has lost some of the cards, and now the deck only contains nine spades, eleven diamonds, eight clubs, and twelve hearts. martha predicts that whenever she draws a card from the deck without looking, she will draw a club one-fifth of the time. which activity would best allow martha to test her prediction? a. randomly draw a card from the box and see if it is a club. b. randomly draw a card. then, continue to draw another card until all eight clubs are drawn. c. randomly draw and replace a card 120 times. then, observe how close to 30 times a club is drawn. d. randomly draw and replace a card 100 times. then, observe how close to 20 times a club is drawn.

Jorge wants to determine the enlarged dimensions of a digital photo to be used as wallpaper on his computer screen. the original photo was 800 pixels wide by 600 pixels high. the new photo will be 1,260 pixels wide. what will the new height be?