Simplify the expression : z^3+6z^2 +z +z^2 +9z +1

Hi my sisters and brothers can tell me the answer because i don’t understand the question

Follow these steps using the algebra tiles to solve the equation −5x + (−2) = −2x + 4. 1. add 5 positive x-tiles to both sides and create zero pairs. 2. add 4 negative unit tiles to both sides and create zero pairs. 3. divide the unit tiles evenly among the x-tiles. x =

Explain why the factor 1.5 is broke. into two numbers in the model.