Can you please help do not understand

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)

Maria has $11 to buy fish for her aquarium. each goldfish costs $2. how many goldfish can she buy? do not include units in your answer

Find the mistake made in the steps to solve the equation below. a. the justification for step 2 is incorrect and should be the subtraction property of equality. b. step 2 is incorrect and should be . c. step 3 is incorrect and should be . d. the justification for step 3 is incorrect and should be the multiplication property of equality.