ALGERBRA

Algerbra is about finding the unknown and keeping it all balanced.

KEYWORDS:

Variable-a letter or symbol representing a quantity. e.g. n,a,x = variables

Equation-An algerbraic equation has only one answer. n+7=23 n=17

Expression-Algerbriac Expressions can have more than 1 answer.  x-3 shows that a number is subtracted by 3.

Subsitution Algerbra-When using subsitution algerbra, replace the value with a variable.    3n+3=18  3(5)+3=18  n=5    (5x3+3=18)

LIKE MY ART!!

If you put it into a table it would turn out like this........

xfigure#-Numerical Order

             -Starts at 1

yCircles- Goes up by 5

            - Starts at 1

-To write it out with an Algerbraic Expression it would look like this:

n=figure#                          5n-4                   

5n-4                                  5(4)-4=16

                                         20-4=16

Now calculate for the 15th figure...

Remember n is the unknown figure..

n=figure#                        5n-4

5n-4                                5(15)-4=72

                                       75-4=71

Another way to show your work is a T-chart....

More information @ http://www.k111.k12.il.us/king/math.htm