 Evaluate the following expressions. when x = 24 when x = 4 when k = 12 1) 2) 3)

 Compare your answers with the people around you. Be prepared to share your answers with the class.

 Evaluate the following expressions. when x = 24 when x = 4 when k = 12 1) 2) 3)

 What is an expression?  Give an example.

 Review your Quiz  Make sure there are no grading errors on it  If there is anything you got wrong, it is worth asking about  Learn from your mistakes  Concepts will reappear throughout all of Algebra 1(A/B)

 Equation: An equation is made when an equal sign is used between two expressions creating a right and left side of the equation = 6

 Open Sentence: An equation that has one or more variables in it.

 x + 2 = 5  Ask yourself the question, “What number can be added to 2 to obtain 5?”

 Another type of open sentence is called an inequality. Inequalities have special symbols.

 Number that makes a true statement when it is substituted for a variable in an inequality.

Step 1: Write inequality Step 2: Substitute for variable Step 3: Evaluate Step 4: Conclusion (true or false?)

 The vet told Mr. V to restrict his dog’s caloric intake to no more than 500 calories each day. Three times a day, Mr. V gives Nike a serving of food containing x calories. Set up an inequality to describe this situation.  Do the following values of x meet the vet’s restriction?  170 calories  165 calories

 1.4 Practice Worksheet  Even problems only  Due tomorrow!  Chapter 1 Test on Tuesday!