3A formulate systems of equations, including systems consisting of three linear equations in three variables and systems consisting of two equations, the first linear and the second quadratic
3B solve systems of three linear equations in three variables by using Gaussian elimination, technology with matrices, and substitution
3C solve, algebraically, systems of two equations in two variables consisting of a linear equation and a quadratic equation
3D determine the reasonableness of solutions to systems of a linear equation and a quadratic equation in two variables
3E formulate systems of at least two linear inequalities in two variables
3F solve systems of two or more linear inequalities in two variables
3G determine possible solutions in the solution set of systems of two or more linear inequalities in two variables.
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