1. Standard: Algebraic Functions 1.0 and 1.1 Students evaluate expressions with variables.

2.  Algebraic Expression – an expression that includes a variable  Variable-a symbol that stands for a number  Examples of Expressions  X+4  11+a  d+9  Variables  a,b,c,d,e…

3.  If x=3  X+7  Answer: 10

4.  If m=8  15+m

5.  If x=3 x=4 x=5  10+x Example 10+3 10+4 10+5  Three answers The answers are =13 =14 =15

6.  If x=4 x= 6 x=8  1. 25-x  2. x+3  3. 11x

7. xX+7 9 12 20 9 + 7 = 12 + 7 = 20 + 7 =

8.  1. 25-4=21  25-6=19  25-8=17  2. 4+3=7  6+3=9  8+3= 11  3. 11(4)=44  11(6)=66  11(8)= 88

9.  Now you are ready for Independent Practice in Lesson 2-10 Math book  Homework Lesson 2-10