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C is the answer.

Step-by-step explanation:

We know that the quadratic equations has to have the x² sign in the equation, so this is a quadratic term. 6x² is the quadratic term because of the x². That means the answer cannot be the second or last choice. The equation doesn't contain the value -12x², so the first answer choice cannot be right. This leaves the third answer choice.

b

step-by-step explanation:

chemists are often responsible for designing a chemical reaction and analyzing the products obtained from it. one significant part of designing a chemical reaction is determining the amount of each reactant that is needed and the amount of each product that will be produced. in order to do so, chemists use stoichiometry, the quantitative relationships between reactants and products.