1. Pg. 19-22 #14-40e, 55

4. 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

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

6. 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

7. 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

8. 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 _____________________.

9. When will I ever use this?

10. Check Yourself Pg. 27-30 #14-50eoe, 74, 79-81 # 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

11. Animated Activity Online http://www.classzone.com/cz/books/algebra _1_2007_na/resources/applications/animati ons/explore_learning/chapter_1/dswmedia/1 _5_AlgebExpress.htmlhttp://www.classzone.com/cz/books/algebra _1_2007_na/resources/applications/animati ons/explore_learning/chapter_1/dswmedia/1 _5_AlgebExpress.html