PHLesson1-7

# PHLesson1-7 - Objective To solve equations over given...

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Objective - To solve equations over given replacement sets. Equalities Inequalities = Equals- is the same as Congruent- same size and shape Similar- same shape < Is less than > Is greater than Is less than or equal to Approx. equal to = Not equal to 2245 ~

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Expressions vs. Equations Numerical Variable Expressions Equations Inequalities 2 + 3 5(8) - 4 x + 7 8 - 3y 2 + 3 = 5 4 + 2(3) = 10 x - 4 = 13 11= 3 + 2m 9 - 5 > 3 6y - 4 < 8 Sentences Open sentences Open sentences have solutions and can be solved.
Identify each as an expression, sentence, open sentence, equation, or inequality. 1) 3x + 5 = 11 2) 7 < 2(5) + 3 3) 5x - 2 4) 6m + 2 > 3 Sentence, open sentence, equation Sentence, inequality Expression Sentence, open sentence, inequality

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State whether each sentence is true, false , or open . 1) 8 + 5 = 13 2) 2x - 1 = 9 3) 17 = 3(5) + 1 4) 3 = 7(2) - 5 5) 14 - 2(3) = 8 6) 9 = 7 + 4y 7) 13 - 2 = 9 8) t + t = 5(2) + 1 True Open False False True Open False Open
{ } Replacement Set { } 0,1,2,3 Equation 2 x x 0 - = Solution Set 0 2 0 0 0 - = 2 1 1 0 - = ,1 2 2 2 0 - ≠ 2 3 3 0 - ≠ Try each key:

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PHLesson1-7 - Objective To solve equations over given...

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