Learning Objective: Activating Prior Knowledge...

Name: ___________________________________ Math 7.2, Period _____________ Mr. Rogove Date: _______________ Alg1M1L8: Solution Sets of Equations and Inequalities joined by “and” or “or” 1 Learning Objective: We will solve compound equations and inequalities that are connected by “and” or “or”. (Alg1M1L8) Activating Prior Knowledge: Compound Sentence: A compound sentence has two independent clauses or sentences joined by a conjunction like “and” or “or.” Examples: • I am in math class right now and it is Tuesday. • I have $20 in my wallet right now or I have candy in my backpack. Concept Development: Compound Equations and Inequalities work much the same way. “AND” Compound Equations/inequalities “OR” Compound Equations/Inequalities In order to be included in the solution set, the solution must make both equations (or inequalities) true. In order to be included in the solution set, the solution must make one of the equations (or inequalities) true. Equation Examples: ! + 2 = 9 and ! − 4 = 3 ! = 7 and ! = 7 ! ! + 5 = 11 and ! = 2 ! = 6 and ! = 2 !"# !"#$% !"# ∅ Equation Example: 4! + 9 = 0 or 3! + 5 = 2 ! = 9 4 or ! = 1 −!, ! ! Inequality Examples: 2! > 8 and 3! < 15 ! > 4 and ! < 5 ! < ! < ! 6! > 18 and 4! < −3 ! > 3 and ! < − 3 4 !"# !"## !"# ∅ Inequality Examples: 4! ≤ 14 !" − 12! > 15 ! ≤ 7 2 !" ! < − 5 4 ! ≤ ! ! −3! ≥ −9 or ! = 12 ! ≤ 3 or ! = 12 ! = !" !" ! ≤ !

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Page 1: Learning Objective: Activating Prior Knowledge ...mrrogove.weebly.com/uploads/4/3/0/0/43009773/alg1m1l8... · CompoundSentence:&Acompound&sentence&has&two&independent&clausesor ...

Name:&___________________________________& & Math&7.2,&Period&_____________&Mr.&Rogove& & Date:&_______________&

Alg1M1L8:&Solution&Sets&of&Equations&and&Inequalities&joined&by&“and”&or&“or”&1&

Learning Objective:&We&will&solve&compound&equations&and&inequalities&that&are&connected&by&“and”&or&“or”.&&(Alg1M1L8)&&Activating Prior Knowledge: Compound(Sentence:&A&compound&sentence&has&two&independent&clauses&or&sentences&joined&by&a&conjunction&like&“and”&or&“or.”&Examples:&&

• I&am&in&math&class&right&now&and&it&is&Tuesday.&• I&have&$20&in&my&wallet&right&now&or&I&have&candy&in&my&backpack.&&

&Concept Development: &Compound(Equations(and(Inequalities&work&much&the&same&way.&

“AND”(Compound(Equations/inequalities(

(

“OR”(Compound(Equations/Inequalities(

In&order&to&be&included&in&the&solution&set,&the&solution&must&make&both&equations&(or&inequalities)&true.&&&

In&order&to&be&included&in&the&solution&set,&the&solution&must&make&one&of&the&equations&(or&inequalities)&true.&&&

Equation/Examples:/&

! + 2 = 9!and!! − 4 = 3!&! = 7!and!! = 7!&

! (&

! + 5 = 11!and!! = 2!&! = 6!and!! = 2!&!"#!!"#$%!!"#!∅(

Equation/Example://

4! + 9 = 0!or!3! + 5 = 2!&! = 9

4 or!! = 1!&

−!,!! (&&

Inequality/Examples:/&

2! > 8!and!3! < 15!&! > 4!and!! < 5!!&

! < ! < !((

6! > 18!and!4! < −3!&! > 3!and!! < − 34!&!"#!!"##!!"#!∅!(

Inequality/Examples:/&

4! ≤ 14!!" − 12! > 15!&! ≤ 7

2 !!"!! < − 54!!(

! ≤ !!&

&−3! ≥ −9!or!! = 12!&! ≤ 3!or!! = 12!&! = !"!!"!! ≤ !(

(&&

Page 2: Learning Objective: Activating Prior Knowledge ...mrrogove.weebly.com/uploads/4/3/0/0/43009773/alg1m1l8... · CompoundSentence:&Acompound&sentence&has&two&independent&clausesor ...

Name:&___________________________________& & Math&7.2,&Period&_____________&Mr.&Rogove& & Date:&_______________&

Alg1M1L8:&Solution&Sets&of&Equations&and&Inequalities&joined&by&“and”&or&“or”&2&

Guided Practice: Steps(for(Solving(and(Graphing(Compound(Equations(and(Inequalities(1.&Identify&the&conjunction&“and”&or&“or”.&&2.&Graph&both&equations&and/or&inequalities&on&the&number&line.&&3.&Rewrite&the&solution&set.&&&

! − 9 = 0!or!! + 15 = 0!&&&&&&&&&&&&&

5! − 8 = −23!or!! + 1 = −10&&&&

! < −4!or!3! > 3&&&&&&&&&&&&

2! ≤ −10!or!4! ≥ 4&&&&&&&&&&

3! ≥ −21!or!2! < −13&&&&&&&&&&&&

3! < −12!or!20! > −160&&&&&&&

Page 3: Learning Objective: Activating Prior Knowledge ...mrrogove.weebly.com/uploads/4/3/0/0/43009773/alg1m1l8... · CompoundSentence:&Acompound&sentence&has&two&independent&clausesor ...

Name:&___________________________________& & Math&7.2,&Period&_____________&Mr.&Rogove& & Date:&_______________&

Alg1M1L8:&Solution&Sets&of&Equations&and&Inequalities&joined&by&“and”&or&“or”&3&

! > −3!and!2! ≤ 8&&&&&&&&&&&&

9! < −27!and!3! > −27&

2! ≥ −4!and!6! ≥ −30&&&&&&&&&&&

3! − 4 ≤ 2!and!5! + 3 ≤ 23&&&&&&&

! < −4!and!3! > 3&&&&&&&&&&&

2! ≤ −10!and!4! ≥ 4&&&&&&&

Rewrite&as&a&compound&inequality&and&graph&the&solution:&

−2 < ! ≤ 8&&&&&&&&&

Rewrite&as&a&compound&inequality&and&graph&the&solution:&

4 ≥ ! > 0&&&&&

Page 4: Learning Objective: Activating Prior Knowledge ...mrrogove.weebly.com/uploads/4/3/0/0/43009773/alg1m1l8... · CompoundSentence:&Acompound&sentence&has&two&independent&clausesor ...

Name:&___________________________________& & Math&7.2,&Period&_____________&Mr.&Rogove& & Date:&_______________&

Alg1M1L8:&Solution&Sets&of&Equations&and&Inequalities&joined&by&“and”&or&“or”&4&

&Independent Practice: &Khan&Academy&Compound&Inequalities:&10&in&a&row&& &Closure:

Mercury&is&one&of&two&elements&that&is&liquid&at&room&temperature.&Mercury&is&nonZliquid&for&temperatures&less&than&−38℉&or&greater&than&673.8℉.&Write&a&compound&inequality&for&the&temperature&at&which&mercury&is&NONZliquid.&&&&&Notes: This&maps&to&Lesson&15&of&Alg&1&Mod&1&ENY&Homework&is&Problem&Set&from&Lesson&15&&&&

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Learning Objective: Activating Prior Knowledge...

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