I need help very bad please. You guys can do any questions just tell me the number

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 9 + 12x + 4x^2

If 7x=9y, y/z = 7/5 , then x/z = (a) 2/7 (b) 7/9 (c) 9/5 (d) 9/7 (e) 5/9

If you eat 4 medium strawberries, you get 48% of your daily recommenced amount of vitamin c. what fraction of your daily amount of vitamin c do you still need?