Arianna is making a cookie recipe that requires 4 cups of sugar for every 12 cups of flour. Arianna only has 9 cups of flour. She concludes that she will only need 3 cups of sugar.

I believe that her theory is correct

Step-by-step explanation:

this is because the ratio of cups of sugar to cups of flour is 1:3 and if we times both sides by 3 we get 3:9 which is the answer she presents

hello from mrbilldoesmath!

answer:

x - 3

discussion:

x^2 - 9 = (x-3) (x+3)   so

(x^2-9)/ (x + 3) = x-3

you,

mrb

£56

step-by-step explanation: