Combine like terms:
simplify:

1. 3a + a² + 5 (a - 2)
2. 8 (v + w) - 7 (v + 2v)
3. 4c² + 6 (c - c²) - 2c
4. z³+ 5 (z ÷ 3) - 4 (2 - 2z²)

you!

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?

Solve this problem! extra ! 3025/5.5 = a/90.75 / = fraction

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?