Brendan's Journal Entry

March 10/10

Today in math we learned how to divide polynomials using algebra tiles.
Then we were given another question about dividing polynomials, It was about a cylinder and what the ratio of the Surface area to the radius was.



To figure out this question you need to know the formula for a cylinder.

The formula is:



At the end of class class we were given homework to do. While we were working Mr. B told us what he wanted in our stash its.
(Chapter 5 & 7 work)

Wednesday, April 14,2010 Test Scribe!

Hello 9-05, so today in math class we had "the hardest math test in history"...

it was on

To anyone who hasn't taken it yet, you should maybe bring some defibrillators( a device that gives you a jolt in order to start your heart again. *yells clear*) because you might be knocked unconscious by the difficulty of the test.

JUST KIDDING!!

Now back to the test.
So I don't remember most of the questions on the test since we just wrote it today. I will be giving examples pertaining to the test questions.

*If you still don't understand the questions then you should ask Mr. B, he will know.

1)

-Create a Table of Values


-Now Figure out the pattern

Here's a table instead, because I thought it would be easier for me to explain it, and you would understand it.
*You don't have to do this but this is to show you how to figure out the pattern

- How many squares are in Figure 8

2) There was also questions that included
- Examining the graphs
-Interpolating Extrapolating
- and answering the questions provided

Finally,
3) There are 3 topping of Ice cream, how many different ways are there
But you can switch around the letters like this: CS <---- Yes
or SC <----- No

-Sprinkles = S
-Cookies = C
-chocolate chips = CC
- Bubble gum = BG

You could do:
CS
CC S
CC C
S BG
CC BG
C BG

There's 6 Different ways

* Read the Questions carefully on the test

HW
-Be ready to hand in your stash its soon.
*Look back later to see what Mr.B wants us to put in it.
-Chapter 6 work
-New chapter 8 sheets (Math link Intro &

I Leave you with some humour :)
Enjoy! ( It starts at "Welcome")
I think the next scribe is Casey!
Thanks for reading and Please Comment!
(If you don't want to wait tell the beginning then go this link
http://www.glitter-graphics.com/graphics/231084)

For Mr. Backe. Math just isn't the same!

Hey Mr. Backe,
Its Brendan or (Less), Wanting to wish you a Merry Christmas and a Happy New Year.
Hope these post will make you happy and we all miss you a lot.

Just remember sub = boring math, but You Mr. Backe = a Very fun, exciting Math teacher.
Even though math can be boring at times, you always seem to spice it up and make it your own, that's why we like you as our Math teacher.

We hope to see you soon, but if that's not possible then that's ok.
We know that you need some time, I hope that you get better soon.
Don't forget that we are your second family as Melanie said, even though that might be weird to other but you aren't a boring teacher and that's why we think of you and our whole class as on big happy family.

One final thing is that you have made a difference in "The Classes" mind, and here is an example for how good you teaching, right before our first report cards when we were in rm.6, Mrs. Mota came in an told us that 9-05 ("The Class") had all passed Math. But before that she said that she wan't suppose to tell us this yet, but she did. When she did Everyone was very pleased.
We couldn't of done it without you Mr. Backe

Thank you so far and I hope you liked my post.
Hope you are feeling better soon.




Here's a video.
Even though its about aids in africa, it shows what people can do when they all come together.
Just like us "The Class", everybody needs love in there life when they are down, even if its just a hug.

Textbook Question #24

Hello Everybody,
Today I will be explaining question 24 in our Textbooks
The question is "Copy and Complete each statement".

*What you need to do for this question is you have to fill in the purple squares with a number.

For A)
To get the answer in the purple box you need to:
Use the Inverse operation and work backwards



Then you can simplify -1 and 1 quarter into -5 fourths and there's your answer



For B)
You have to use the Inverse operation and work backwards

Which should give you a answer of



For C)
You have to use the Inverse operation and work backwards


Which should give you a answer of



For D)
You have to use the Inverse operation and work backwards



Which should give you a answer of


Thanks for reading

Textbook Question #24

Hello everybody,
Today I will be explaining Question #24 in our textbooks.

The question is "Copy and Complete each statement".



*What you need to do for this question is you have to fill in the purple squares with a number.

For #1
To figure this question out you have to:
Subtract (-3.5) - 1.8 , which will give you an answer of -5.3.
To verify that you put in -5.3, where the square is and you should get the answer given in the question.
The question after you have filled in the answer, should look like this, (-5.3) + 1.8 = -3.5.

For # 2
First you need to subtract (-13.3) by (-8.9), which will give you an answer of -4.4
To verify that you put in -4.4, where the square is and you should get the answer given in the question.
The question after you have filled in the answer, should look like this, (-13.3) - (-4.4) = -8.9

For #3
First you need to figure out what multiplied by (-4.5) gives you -9.45. To do that you need to find out a certain number, and we all know that 2 × -4.5 = -9, so to get to -9.45 you need to go 2.1 × -4.5, which will give you the answer of -9.45.
The question after you have filled in the answer, should look like this, 2.1 × -4.5 = -9.45.

For #4
First you need to divide -18.5 by 7.4, which will give you an answer of -2.5
To verify that you put in -2.5, where the square is and you should get the answer given in the question.
The question after you have filled in the answer, should look like this, -18.5 /2.5 = 7.4.

There you have it question 24 solved.
Thanks for reading!
Please leave a comment

Scribe Post for October 16, 2009

Hey, 9-05. Today in class, we had a math test. It was mostly on surface area and bit on symmetry too. Today I will be showing you how to do questions on the test we had. One thing is, that you really need to know your formulas for all the shapes and also know when to use them.


These question are examples of what you need to know in order to answers the questions right. But they are not same as the test. The reason for this is that not everybody has taken the test yet and I don't have the test in front of me so I don't remember the exact measurements that were on the test.

These are some examples:

To figure the cylinder you need to know the formula for a cylinder.
Which is:
H=15
Radius=3
S.A. = 2πr²+2πrh
= 2π(3²)+2π(3)(15)

= 2π(9)+2π(45)

= 2(28.27)+2(141.37)

= (56.54)+(282.74)

= 339.28cm²


This is the formula for a rectangular prism
2(lw)+2(lh)+2(hw)

2(4)(2)+2(4)(1)+2(1)(2)

2(8)+2(4)+2(2)
16+8+4
=28




Thanks for reading.
The homework is on the grade 9 homepage.
Please comment

Why 360°?

Why 360° Degrees

Hello to rooms 9-05 and 9-06,

Today the question I am answering is why 360° Degrees? Why not another number you ask? Well the answer to that question is very simple.

The main reasons for choosing the number 360 are

The Babylonians created their number system called the sexagesmal number system. Which uses a base of 60 instead of what we use now, which is a base of 10.



Another reason for picking the number 360 is that it have many divisors, actually it has 24. They are 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 40, 45, 60, 72, 90, 120, 180, and 360. including 1 and its self. They chose this number because they thought if it had a lot divisors then it would work, instead of using a base of 10 which only has 4.(1,2,5,10)

360 is also a good number to divide a circle into equal parts which why it was picked. If you look around theirs a lot of example of 360, Time: 60 min. in a hour, the one everyone knows the best, the calender: which had 360 days in a year, where the earth would rotate around the sun. Making one full year. But before we added 5 for days to the calender so we could be more accurate, the Babylonians stayed with 360.


That is why I think the number 360 was chosen. Thanks for reading my explanation on why 360 was picked!
Please leave comments, because nobody can be perfect.