ACT Math Lesson 2

Topics​

• ​Routine Equations & Inequalities

• Functions (Evaluating & Nested) ​

• ​Slope and Word Problems

• Quadratics​

• Sequences and Series

• ​Polynomials

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• Remember to cross multiply when needed (fraction=fraction)

• Remember to flip the inequality sign ​when dividing or multiplying by a negative

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Equations and Inequalities:​

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• solve by substitution or elimination

• this gives the point where the two lines intersect

• if everything cancels, the answer is either no solution or all real numbers ​

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System of Equations ​

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• ​change in y/change in x

• Horizontal Line: 0 slope

• Vertical Line: No slope

• Parallel Slopes SAME

• Perpendicular OPPOSITE ​

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​Slope

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• anything in the parenthesis gets plugged into the function that is by it.

• f(2) means to plug 2 into the x's in the f equation

• f(g(x)) means to plug the g function into f ​

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Functions ​

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• Remember your factoring rules​

• Remember to change signs of your parenthesis

• Remember to use Quad Formula if needed​

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​Quadratics