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Do Now Pg 52 #18-21
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1.5 Solving Inequalities Learning Goals: solve and graph inequalities
Inequality Old Symbol New, more mature symbol < ○ ) > ( ≤ ● ] ≥ [ Learning Goals: solve and graph inequalities write and solve compound inequalities
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Features of Inequalities
Inequalities have more than 1 solution When you MULTIPLY or DIVIDE by a negative number you MUST flip the sign. What happens if we multiply the inequality by –1 ?
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EX 1 Set Builder Notation: Interval Notation:
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EX 2
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compound inequality: a pair of inequalities joined by AND or OR AND – BOTH are true OR – At least ONE is true
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EX 3
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Phone number Key in the 1st three digits of your phone number (not the area code) Multiply by 80 Add 1 Multiply by 250 Add the last four digits of your phone # Add the last four digits of your phone # AGAIN Subtract 250 Divide by 2 SEE YOUR PHONE NUMBER ON YOUR CALCULATOR???
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EX 4
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EX 5
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****Special Cases****
EX 6
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****Special Cases****
EX 7
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****Special Cases****
EX 8
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****Special Cases****
EX 9
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In your group, work the following problems.
Ex 10 In your group, work the following problems.
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