What is difficult about using function notation ? What is easy?

(PRE- Algebra)

Adam used 1072.4 gallons of water over the course of 7 days. how much water did adam use, on average, each day?

You use technology ans find a sum of 6.712e-8. write this sum in standard form

Plz 20 points polynomials 1: subtract and simplify (–y^2 – 4y – 8) – (–4y^2 – 6y + 3) 2: multiply and simplify 2x^2 y^3 z^2 · 4xy^4 x^2 3: multiply and simplify (x – 4) (x2 – 5x – 6)