## Wednesday, March 25, 2009

### Scribe Post for March 25, 2009

Today in Math we did number of the day, 1347.892. Then we were given a Sudoku to complete using the letters... S.P.R.I.N.G.

The first one we were given was Easy,

The next one was supposed to be harder,

The last one was the Hardest,

We had to later correct them...

This is the answer for #1

2.

This is the answer for #2

After we were done we got to play a game with a friend called Isolation, this game is where the players take turns at colouring a hexagon, and you couldn't colour a hexagon that is joined to one that is already coloured. the object of the game was to be the last player to shade in a hexagon.
Thank You For Reading My Scribepost
The Next person to do the blogging will be ...
umm I don't know Kevin I guess
Sorry that i wasnt able to post the answer for Sudoku #3 but i wasnt able to get it written down.

## Tuesday, March 24, 2009

### Scribe Post for March 23, 2009

Yesterday in class, we started off with "Number of the Day". The number of the day was 8756.934. Then we took some notes on perpendicular bisector and angle bisector.

Here are the notes:

Bisect: -Bi means "two"

-sect means "cut"

-so bisect means to cut in two

Perpendicular Bisector

A line that divides a line segment in half and is at right angles to it

eg.

How can you create or draw a perpendicular bisector?

1. Free hand, o.k. but not perfect

2. Protractor gets us 9o degree angle

-Ruler cuts line in half

eg.

3. Use a compass and create arcs
eg.

a) Open compass to greater than half the distance of line

b) Place compass on point A, draw an arc

c) Place compass on point B, draw an arc

d) Use a ruler to connect the intersections of the arcs that line is a perpendicular bisector

Angles

Angle: the figure formed by two lines with a common endpoint called a vertex

eg.

Acute angle: less than 90 degrees

eg.

Obtuse angle: more than 90 degrees

- less than 180 degrees

eg.

Angle bisector: the line that divides an angle into two equal parts

eg.

How do we make an angle bisector?

1. Free hand not perfect not accurate enough

2. Protractor

eg.

3. Compass

eg.

a) Arc from vertex

b) Arc from point S (intersection of line and arc)

c) Arc from point T (intersection of line and arc)

d) Line from arc intersections to vertex that is your angle bisector

After taking down all the notes, we worked on page 116-121 (Math Links)

I pick Telissa to do the next scribepost

## Sunday, March 22, 2009

### Scribe Post for March 20, 2009

BY Devin

On Friday we started with ''number of the day" and the number we did was "4792.831".

After Number of the Day, we did notes on

These are the notes
parrallel-describe lines in the same plane that never cross or intersect
-they are marked using arrows
'
perpendicular- describes lines that intersect at right angles(ninety degrees)
-they are marked by using a small square
I chose Alex to do the next scribe post

## Tuesday, March 17, 2009

### Scribe Post for March 17,2009

Today in class the number of the day is 1936.295 so you all know that it's homework.

In math class we were taking notes about Area.
So for now I don't even know how to put drawings or pictures in the post so sorry guys.

Now I'm going to tell about area.

Area is the number of square units contained in a two dimensional region

Parallelogram - a four sided figure with opposite sides parallel and equal length

Base - A side of a two dimensional close figure
- common symbol is b

Height - the perpendicular distance from the base to the opposite sides.
- common symbol is h

Perpendicular
- A line that meets another line at a right or 90 degree angle.

Those were the notes we have taken.

Here's a video about Volume (L x W x H) oh and if the link ain't working then press ctrl + left click

I choose Alex to be the next scribe post

## Saturday, March 14, 2009

### Scribe Post for March 13, 2009

Today at school we started with the Number of the day. For those who were away the number is 2468.135. Remeber number of the day is ALWAYS homework!

1. Half of the number of the day is:
2. Write the number of the day in expanded form:
3. Write the number of the day in written form:
4. Round the number of the day to the nearest 100:
5. What number is in the tenths place:
6. The number of the day doubled is:
7. Write the number of the day in expanded notation:
8. Write a power using the number in the 100th place as the base and the number in the 10s place as the exponent:
9. Write the above power in factored form:
10. Cube the number in the ones place:
11. Square the number in the hundreds place:
12. Divide the number by 3.55 and round to the nearest hundredth:
13. The product of all the numbers in the number of the day is:
14. List all the prime numbers in number of the day:
15. Write the number of the day in scientific notation:
16. The whole number is divisible by (circle): 2, 3, 4, 5, 6, 8, 9
17. Combine the numbers in the 1s place and the 10s place respectively to make a two digit number and write the prime factors:
20. Write a fraction using the 1000s place as the denominator and the tenths place as the numerator:
21. Use any two numbers to make an improper fraction:
22. Use any of the numbers to make a mixed fraction:
23. Write the answer to number 22 as a decimal:
24. Draw a picture to represent the answer to number 22:
25. Write the answer to number 21 as a percent:

We also took notes on Still More Probability.

Random- an event in which every outcome has an equal chance of occuring.

Experimental probability- the probability of an event occuring based on experiment results.

Theoretical probability- the expected probability of an event occuring.

e.g. flipping a coin
Theoretical probability Experimental probability
favourable over possible do the experiment

The larger or more trials in an experiment the closer experimental probability gets theoretical probability.

After that we took out our Maths links text book. We worked on page 180 and number 1 to 11.

Thank you for reading my scribepost.
I choose DEVIN to do the next blog.

## Thursday, March 12, 2009

### Scribe post for March 12, 2009

first we had to do the number of the day.Our number was 1247.936.Then we had a test.The test was about probability stuff.After if we were done the test we had to solve a question.The question was I have 3 pairs of hoodies(black,blue,red) 4 t- shirts, 4 pairs of pants and 3 pairs of shoes.If I wear ! of each. How many different outfits can I wear?
White,Brown,Black. What is the provability I will wear all black?
I choose DEVIN to do the next blog.

## Tuesday, March 10, 2009

### Probability tree and table

In class today we had to do a tree diagram to solve the answers to Page 168 from 2 to 14. We also kinda learned how to use a table diagram as well.

Here is an example of a tree diagram and a table diagram

## Monday, March 9, 2009

### Scribe Post for March 9, 2009

Today in math class we started off with the " The Number of the Day ", which was "7839.126". ( Remember it is homework everyday ) After the teacher told us to take notes.

The notes were on: More Probability

The teacher gave us two questions to solve, which were:

QUESTION: P( rolling a prime number ) with a regular die.
ANSWER: P ( rolling a prime number ) = favourable outcomes
-------------------------------
possible outcomes
= 3/6
= 1/2 or 1:2 or 50%
don't forget to simplify it ---^
QUESTION: Find the probability of rolling two 6's in a row with a regular die.
ANSWER: P (rolling two 6's in a row) = favourable outcomes
-------------------------------
possible outcomes

= 1/36 or 1:36 or 2.8%

To solve the question above you need to use the probability tree.

We also had to take down definitions:

Independent events : - the outcome of one event had no effect on the outcome of another event.
Sample space: - all possible outcomes of an experiment.
Tree diagram: - a diagram to organize outcomes
- contains a branch for each possible outcome of an event.

QUESTION: Probability of landing a coin on heads and rolling an odd number
(simplify) 1/4 1:4 25% ( to find the answer you need to use a probability tree or a probability table.

A) Trudy, Shana, Saira, Kendra, and Tracie are on team A. Jordan, Micheal, Terrance, Sean, and Suni are on team B. Use a diagram to show all the possible outcomes if the coach assigns each person on team B to defend against a player on team A.

B) Write the sample space.
I chose ERIC to do the next blog.

## Wednesday, March 4, 2009

### ScribePost for March 3, 2009

Today in math class, we did "Number of the Day" with the number as "7791.692".

Afterwards teacher guy went up to the projector, pushed a button, turned it on, made a noise, and showed us some notes to take down.

The notes were on:

First we had to take down some words and their definitions.

Outcome - One possible result of a probability experiment.

Favorable Outcome - A successful result in a probability experiment.

Then he gave us an example with some questions.

"The tiles "S, N, O, W," are placed in a bag.

First question: What is the probability of drawing the letter "W" from the bag?

Another way to write that question is P(W)
(P stands for probability)

P(W) =
favorable outcomes
----------------------------
possible outcomes

So then most of us thought, Hmm, 4 letters, and we only want one of the letters so it must be:

P(W) = 1

---
4

Another way of expressing that is
25%
or
1 : 4

Second Question: What is the probability of drawing a S or an O from the bag? P(S or O) =
favorable outcomes
------------------------
possible outcomes

Now you had to think, 4 letters and we want 2 of them so what are the chances of getting them?

It was, of course,:

2 1
-- simplified as --
4 2
50%
2 : 4

P(S or O) = 1 P(S or O) = 50%
-- or
2
P(S or O) = 1 : 2

Third Question: What is the probability of drawing a consonant from the bag?
P(consonant) =
favorable outcomes
----------------------------
possible outcomes

Since in class, like around 10 people don't know what a consonant is so click that link for the definition.

Anyway, if you know what a consonant is, this is easy since there are 3 conso
nants, "S, N, and W". Three favorable outcomes, and four in total, you should know this by now:

P(consonant) = 3
--
4

Another way to write this is
75%
or
3 : 4

Fourth and last Question for "S.N.O.W.": What is the probability of drawing a "B" from the bag?
P(B) =

favorable outcome
----------------------------
possible outcomes

Really simple if you listened, there are 4 letters, you want to draw "B", but there is no "B", so there is ZERO chance of drawing it. This is not out of 4 because now there are 5 choices:

P(B) - 0
--
5

Another way to write this is
0%
or
0 : 5

After all that stuff, we were given ANOTHER problem.

A bag contains 10 marbles. Show the probability of the following events as a fraction, a ratio, and a percentage.
1. 3 Blue
2. 6 Red
3. 3. Green

A. What is the probability of drawing a red marble?
P(red marble)=
favorable outcomes
----------------------------
possible outcomes

There are 6 red marbles, 10 marbles in total, this is obviously 3 over 5 simplified.
3
--
5
or
60%
or
6 : 10

B. What is the probability of selection a red or blue or green marble?
P(R or B or G)
favorable outcomes
----------------------------
possible outcomes

There are ONLY red, blue, and green marbles in this bag so that makes it a 10 out of 10 chance. -.- STEPHANIE -.-
P(R or B or G)
1
--
1
or
100%
or
1 : 1

C. What is the probability of NOT selecting a red?
P(B or G)=
favorable outcomes
----------------------------
possible outcomes

Your trying not to get a red, so you have to find the probability of all the rest of the outcomes. So add up the amount of blues and greens to get your numerator and the total of all the outcomes as your denominator.
P(B or G)=
4 2

-- simplified --
10 5
or
20%
or
4 : 10

Finally its over!

Homework:

Here are the letters you have to work with:

M.O.U.N.T.A.I.N.

A.What is the probability of drawing the letter "N"?

B.
What is the probability of drawing a consonant?

C.
What is the probability of drawing a letter?