Pg. 19-22 #14-40e, 55. 1-4 Equations and Inequalities Equation = formed when an equal sign (=) is placed between two expressions creating a left and.

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Presentation transcript:

Pg #14-40e, 55

1-4 Equations and Inequalities Equation = formed when an equal sign (=) is placed between two expressions creating a left and right side. Open sentence = is an equation that contains one or more variables –Ex: 4-b=3 3x+1=7 a+3=3+a Solution of an equation = when a value is substituted for the variable in an open sentence and the statement is TRUE, the number is a solution

Practice Check whether the given number is a solution of the equation

Practice 2 Write a question that could be used to solve the equation. Then use mental math to solve the equation. 1.) N+6=11 Ans: What number can be added to 6 to get 11? N=5 2.) 4p=36 Ans: What number can be multiplied by 4 to get 36? P=9 3.) Ans: What number when divided by 7 gives 3? X=21

Practice 3-Inequalities >,<, Check whether the given number is a solution of the inequality. 1.) 5+s > 8; 4 Ans:5+4 > 8 IS a solution because 9 > 8 2.) Ans: 5 IS a solution because 3.) Ans: 2 IS a solution because

Summary An ___________ is formed when an equal sign is placed between two expressions creating a left and right side. Substituting a number for the variable in an equation to see whether the resulting statement is true is called checking a possible _______________. > and < are examples of ______________. An equation that contains one or more variables is an _____________________.

When will I ever use this?

Check Yourself Pg #14-50eoe, 74, # 14-22: substitute the last number given for the variable in the equation to see if the left side equals the right side #26-34: Write a question for the problem, then figure out what the value of the variable would be to make it a true statement. #38-50: substitute the last number given for the variable in the inequality to see if it makes a true statement

Animated Activity Online _1_2007_na/resources/applications/animati ons/explore_learning/chapter_1/dswmedia/1 _5_AlgebExpress.htmlhttp:// _1_2007_na/resources/applications/animati ons/explore_learning/chapter_1/dswmedia/1 _5_AlgebExpress.html