Eu quero resposta de Química de verdadeiro ou falso​

Which two undefined geometric terms always describe figures with no beginning or end?

Add. express your answer in simplest form. 12 9/10+2 2/3 = i need u guys to me find the answer to this question

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)