By the end of the lesson the learner can solve and graph linear inequalities in one unknown.
By the end of the lesson the learner can solve simultaneous linear equations by substitution and elimination.
By the end of the lesson the learner can model real situations with inequalities and simultaneous equations.
Transcript
[0:00] An inequality compares two quantities using symbols for less than, greater than, or equal-or-more.
[0:45] We solve inequalities like equations, but if we multiply or divide by a negative we flip the symbol.
[1:30] Simultaneous equations are two equations true at the same time, sharing a common solution.
[2:15] In elimination we add or subtract the equations to remove one unknown, then solve for the other.
[3:00] In substitution we make one unknown the subject and replace it in the other equation.
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