Monday, May 29, 2006

Levinia's Growing Post #3!!!

1.) What is the difference between an algebraic expression and an equation (hint: One contains this and the other doesn't)? Give an example of both an expression and an equation.
- An algebraic expression has one or more numbers and variables with one of the four basic mathematical functions--->variable, constant, coefficient and mathematical method. An algebraic equation also includes an equal sign. The equal (=) sign is followed by the answer of the equation.


2.) What is a variable and why do we use one in algebra?
- The variables are the letters that represent unknown quantities or numbers They vary so we can substitute a variable for one or more numbers. We use variables so we can find the value of the number.


3.) solve for N


9-4= 5
12+5+5= 22
22/2= 11
N=11
- One circle is equal to 1. All 9 circles are equal to 9. Two squares are equal to 4 . One trianlge is equal to 5 so 9-4= 5.
- 6 squares are equal to 12 so 12 + 5 + 5= 22
- 22 divided by 2 is 11, then N is equal to 11


4.) Solve the following equations. Show all of the steps that are needed.

a.) 3n+4n+7=2n+12

7n+7= 2n+12
7n-2n+7=2n+12-2n
5n+7-7=12-7
5n+7-7=12-7
5n/5= 5/5
n=1


b.) 8n-(4+9)=11

8n-13=11
8n-13+13=11+13
8n=24
8n/8=24/8
n=3


c.) (8-3)n+7n+8=4n+40

5n + 7n + 8 = 4n = 40
12n+ 8 = 4n + 40
12n - 4 + 8 = 4n + 40 - 4
8n + 8 = 40
8n + 8 - 8 = 40 - 8
8n = 32
8n / 8 = 32 / 8
8n / 8 = 4
32 / 8= 4
n = 4


5.) For this question you need to create a T-Chart and a graph to plot your data from this question onto.

You are having a race against your friend, except you are on foot and he is on his bike. You both know that if you are in your bike you will be faster so your friend gives you a head start of 3 minute. If you can run 400m per minute, and your friend can bike 700m per minute, who will be the first to make it to the finish line 2000m away?



Levi won the RACE!!! =)





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3 Comments:

At 7:36 PM, Blogger Mr. Reece said...

So far it is looking great. I am looking forward to seeing the remaining portion of this post.

 
At 4:40 PM, Blogger Julie Rose said...

wow!!=D

 
At 2:01 PM, Blogger Mr. Reece said...

You never gave an example of an expression and an equation. Otherwise this is a great post.

Your mark is 28/30

 

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