Area of composite shapes

Answer asap and if you do you will get brainliest. catherine buys a gallon of ice cream from the store. after taking it home, she eats a fifth of a gallon of ice cream. her sister eats some of the ice cream as well. if two-thirds of the original amount of ice cream is left, then what fraction of a gallon of ice cream did her sister eat?

Find the vertex for the parabola given by the function ƒ(x) = −3x2 − 6x.

What are the factors of me - 12m + 20?