Stefan is three years younger than his sister katie. the sum of stefans age three years ago and 2/3 of katies age at that time is 12.how old is katie now. show your work

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

Acaterpillar eats 1400\%1400% of its birth mass in one day. the caterpillar's birth mass is mm grams. which of the following expressions could represent the amount, in grams, the caterpillar eats in one day? \

Me its important ! marge runs an ice cream parlor. her speciality is triple chocolate sundaes.she can prepare 1 sundae every 2 minutes, and she earns $1.20 for each sundae she makes . if she just makes sundaes for a single shift of at most 4 hours and at least 2 hours , which function relates her earnings to the number of minutes she works?