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Absolute Value Equations and Inequalities - Document preview page 1

Absolute Value Equations and Inequalities - Page 1

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Absolute Value Equations and Inequalities

A set of algebraic problems focusing on absolute value equations and inequalities.

Benjamin Clark
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12 months ago
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Absolute Value Equations and Inequalities - Page 1 preview imageAbsolute Value Equations and InequalitiesPractice 1-5Absolute Value Equations and InequalitiesWrite each specification as an absolute value inequality.6.3 ≤h≤ 10.3Mid pointof the intervalis (10.3+6.3)/2 = 16.6/2 = 8.3Distance to endpointsis10.3-8.3 = 2Absolute Value is:|h-8.3| ≤ 22.-2.5 ≤ a2.5Here midpoint is 0.Distance to endpoints is 2.50 = 2.5Therefore, absolute value is|a|≤ 2.53.22x33Midpoint is (33+22)/2 = 27.5Distance is 3327.5 = 5.5Therefore, absolute value is|x27.5|≤5.5Solve each inequality. Graph the solutions.4.5+x>12Break up the absolute value x + 5 <-12 and x + 5 > 12x + 5 <-12……………Subtract 5 from both sidesx + 55 <-125x <-17Now lets focus on the secondinequalityx + 5 > 12Subtract 5 from both sidesx + 55 > 125
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Absolute Value Equations and Inequalities - Page 3 preview imagex > 7Therefore answer isx <-17 or x > 75.3k19Break up the absolute valuek-319andk-3-19k-319……………Add 3from both sidesk3 + 319 + 3k ≤ 22Now lets focus on the secondinequalityk-3-19Add 3from both sidesk-3+ 3 ≥-19 + 3k-16Therefore answer isk≤ 22ork ≥-16 or-16 ≤ k ≤ 226.2+x≥ 0Solution for this equation isall real numbers.7.25t<14Divide both sides with 2.5t<14/2= = >5t<7Break up the absolute valuet-5< 7andt-5>-7t-5< 7……………Add 5from both sidest5 + 5<7 + 5t < 12Now lets focus on the secondinequalityt-5>-7Add 5from both sidest-5+ 5 >-7 + 5
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