a variable is an unknown quantity. for example: what goes in the box? 7 3 + 7 = 10 3 + ? = 10 10 =...
DESCRIPTION
Think of x as being a jar of jelly beans. X = So, 4x = We don’t know how many jelly beans are in the jar, so we give it a name, x. Suppose that there are 300 jelly beans in each jar, then x = 300. How many would be in 4 jars? X = We have 4 x’s, so 4(300) =TRANSCRIPT
2.5 The Distributive Property
Understanding Variables
A variable is an unknown quantity. For example:
What goes in the box? 7
3 + 7 = 10
3 + ? = 10
10 = 10
MEANS 4 TIMES THE SET OF X.4XThink of x as being a jar of jelly beans. X =
So, 4x = We don’t know how many jelly beans are in the jar, so we give it a name, x.
Suppose that there are 300 jelly beans in each jar, then x = 300.
How many would be in 4 jars? X = 300300
We have 4 x’s , so 4(300) =1200 300 300300300
Set Theory
Area of rectangles
Remember: Area = length * width
Area = length * width
Area = (x+2) * 3
Find the area of the rectangle.
AREA = 3 ( x + 2 )
Distributive Property
3 ( x + 2 )
3 ( x ) + 3 ( 2 )
3x + 6
Hippity – Hoppity, Distributive Property
Hippity
Hoppity
♫♪♪ ♫♪♪
Examples
You Try It!
Terms: -x , 2x, 8 Coefficients: -1 , 2
Constant Term: 8 Like Terms: -x , 2x
Terms and Coefficients
You Try It!
3x – 4 – 6x + 2
How many chickens?
How many Horses?
How many pigs?
3
2
1
3 12
You cannot combine different animals!
Combining Like Terms
Make sets out of like terms
2526533 yzxzyx
Combine the like terms.
25)52()3()63( yzzyxx
x9 y3 z7 25y
TAKS Practice
Pg. 99-100 5-40
CLASS WORK / HOME WORK