## Wednesday, October 13, 2010

## Monday, June 21, 2010

Define

perpendicular- Describes line that intersect at right angle

Parallel- Line that never meet

Intersection- Line that Cross at any angle

perpendicular bisector-A line that divides a line segment in a half

Angle bisector- of a triangle is a line segment that bisects one of the vertex angle of a triangle.

acute angle- An acute angle is one which is less than 90°

Label

Parallel

Intersection

Angle bisector Perpendicular bisector

## Friday, June 18, 2010

### Measures of Central Tendancy

You can find the mean by the sum (adding) of a set of values divided by the number of values in the set.

eg. 4,5,8,9,9

=4+5+8+9+9 / 5

=35 / 5

=7 <- that is the mean or average

mean-7

median-7

mode-7

b)300,250,400,300,250

-250,250,300,300,400

mean-300

median-300

mode-250 and 300

### Measure of Central Tendency

- can be mean, median, mode

Median - the middle number in a set of data after the data has been arranged or ordered

eg. 2, 5, 6, 8, 9 median is 6

eg. 1, 3,

**6, 8**, 9, 10 median is 7

*add the two middle values together then divide by two : 6 + 8 = 14 14 divided by 2 = 7

*to find the median of data sets with an even number of values (eg. 2, 3, 4, 5, 6, 7) you have to use the above steps (add together , divide sum by 2, or in other words, find the mean/average)

Mode - the most frequently occuring number in a set of data

eg. 3, 5, 7, 7, 9 mode: 7

eg. 2, 2, 4, 6, 6, 8, 11 mode: 2 and 6

eg. 1, 2, 3, 4 mode: none

eg. 1, 2, 2, 2, 3, 3, 4, 4 mode: 2

eg. 2, 3, 2, 3, 4, 2, 4, 3, 4

2, 2, 2, 3, 3, 3, 4, 4, 4 mode: none

Mean - a measure of central tendency

- the sum (adding) of a set of values divided by the number of values in a set

eg. 4, 5, 8, 9, 9

= 4 + 5 + 8 + 9 + 9 divided by 5 = 35 divided by 5

=

**7**- this is the mean

Mean -

**A. K. A.**- average

Try these, find Mean, Median, Mode.

A) 7, 8, 6, 9, 9, 5, 7, 7, 8 ,4

4, 5, 6, 7, 7, 7, 8, 8, 9, 9 median: 7 mode: 7 mean: 7

B) 300, 250, 400, 300, 250

250, 250, 300, 300, 400 median: 300 mode: 250 and 300 mean: 300

Here are some websites to give you some extra help if you're still stuck.

http://www.mun.ca/educ/ed4361/virtual_academy/campus_a/losinskim/mean,median,mode.html

__http://simon.cs.vt.edu/sosci/Site/MMM/mmm.html__

Here is a link to a video that is catchy and helps to remember the mean, median, and mode.

http://www.youtube.com/watch?v=uydzT_WiRz4

Sorry it's a link, I couldn't get it to upload.

Props to Julibella :). I saw the video on her post and it gave me the idea to use it.

### Measures of Central Tendancy

*is by the*

**mean****sum**(adding) of a set of values divided by the number of values in the set.

eg. 1+2+3=6/3 eg. 4,5,8,9,9

3 sets of values

=4+5+8+9+9/5

=35/5

=7<- this is the

**. a.k.a**

*mean***average**

Try this

**mean, median, mode**

A) 7,8,6,9,9,5,7,7,8,4

**mean**-7

**median**-7

**mode**-7

B) 300,250,300,300,400

**pg.431-433 #2-16**

http://www.youtube.com/watch?v=QH2obAPwfqk

-Here is a video about mean, median and mode. I hope it helps:)

### exam review

## Thursday, June 17, 2010

The expression for this would be 3c+5

This an expression because it's not asking for the answer.

Write an expression representing 3 more than six times a number.

bn+3 is the expression.

bn becaue these letters are kissing that's means it is mutyplying.

+ 3 means it adding 3 of course.

SO alway's remeber that a expression means

the question. NEVER ANSWER An EXPRESSION.

Jimmy leaves home with 20$ in his pocket. He stops at billy's house to collect the $15

he lent to billy. He then goes and buy's flowers for casey because it is her birthday. The flowers

cost $27, how much money does jimmy have left?

20+15=35

35-27=8

jimmy has 8 dollors left.

*cheack out this link that talks about expressions*

http://http://en.wikipedia.org/wiki/Mathematical_notation#Expressions

## Tuesday, June 15, 2010

### How To Scribe

## Friday, June 4, 2010

### Exam Review Study Guide

Perpendicular- lines that intersect at right angles (90 degrees)

Parallel- lines in the same plane that never cross or interest

Interescting- lines that cross at any angle

Perpendicular bisector- a line that divides a line segment in half at a right angle

Angle bisector- a line that divides an angle into two equal parts

Acute angle- an angle at less than 90 degrees

Obtuse angle- an angle more than 90 degrees

Right angle- an angle exactly 90 degrees

- the formula for the area of a triangle is base times height divided by 2.

- the formula for the area of a parallelogram is base times height.

If the base of a parallelogram is 50m and the height is 20m, what is the area?

A= bxh

A= 50 X 20

A = 1000 m 2

Converting fractions, decimals and percents...

-Remember that fractions are out of any whole number.

-Percents are out of 100.

-Decimals are out of 1.

Sorry for not including any pictures, my computer is messed up at the moment..

*

*** Reminder ****

**Be sure to have the math package ready to hand in by Monday!**

**And study, study, study for the exaaaams.**

**Have a good weekend :D**

**Make sure you comment on all the blogs even the old ones?**

**Make sure you do all 10 of the homework package we got today so you can get marks.**

**1. 449-451 #3-16**

**2.444-445 #1-8**

**3.426-427 #1-17**

**4.405-407 #1-21**

**5.327-439 #1-21**

**6.319-322 #1-23**

**7.313-315 #1-20**

**8.270-272 #1-15**

**9.247-251 #1-3**

**10.220-221 #1-14**

*DEFINE*

*Perpendicular- Describe lines that intersect at right angles.*

*Parallel-Discribe lines in the same plane that never crossor intersect.*

*Intersecting- lines that cross at any angles.*

*Perpendicular bisector- A line that divides a line segment in half and is at right angles to it.*

*Angle bisector-*

*acute angle-*

*obtuse angle-*

*right angle-*

*formula area of triangle-*

*formula area of parallelogram- X*

*B x X*

### Term 3 homework package

Please hand the package to me in the following order.

1. pg. 449 - 451 # 3 - 16

2. pg. 444 - 445 # 1 - 8

3. pg. 426 - 427 # 1 - 17

4. pg. 405 - 407 # 1 - 21

5. pg. 327 - 329 # 1 - 21

6. pg. 319 - 322 # 1 - 23

7. pg. 313 - 315 # 1 - 20

8. pg. 270 - 272 # 1 - 15

9. pg. 249 - 251 # 1 - 3

10. pg. 220 - 221 # 1 - 14

If you are disorganized and can't find your homework from term 3, you will have to redo any pages you are missing. Log on to mytextbook.ca for the pages you need to complete.

## Wednesday, June 2, 2010

Rotation-A turn in a center of rotation.

Reflection-A flip over a mirror line.(Mirror Line can be anywhere,not only on axis)

Quadrants-The four regions on the grid.

X=Horizontal

Y=Vertical

X always before Y.

MORE EXAMPLES OF A CARTESIAN PLANE:)

EG. of Rotation:)

EG. of Reflection:)

MATH TEST TOMOROW!

STUDY FRACTIONS,INTEGERS,MEAN,

MEDIAN,MODE,OUTLIER,RANGE,

ALGEBRA,TRANSLATION,ROTATION,

REFLECTION,and etc.(WILL BE SCANTRON XD)

http://www.youtube.com/watch?v=xhLCYp8CVIQ&feature=fvw

## Tuesday, June 1, 2010

### Term 3 Test : Thursday, June 3

Fractions- adding, subtracting like and unlike denominators and mixed numbers

Integers- adding, subtracting positive and negative numbers, using number lines and chips

Algebra- 1 step and 2 step problems, check your answer

Measure of Central Tendency- mean, median, mode, range, and outliers

Remember:

-the test is Scantron

-30 questions

-no extra time to finish your test

Exam Review- Study Guide

1. 27.53 + 1.09 + 62.78 + 9.87 = ?

2. 849.37 - 26.08 - 3290165 = ?

3. 13.94 x 22 = ?

4. 451.231 ÷ 24.13 = ?

5. 223.8704 ÷ ? = 59.54

8. 4cubed -(5x2-5)-(20+13x3) = ?

Don't forget to study all of your term 3 notes to be prepared for you test! Good Luck! ☺☻

This is a video of how to subtract mixed numbers with unlike denominators.

This is a video on how to add and subtract integers.

This is a video on how to do 2 step algebra.

These two videos are on Measure of Central Tendency: Mean, Median, Mode, and Range.

## Tuesday, May 25, 2010

### Chose the Best Measure of Central Tendancy

## Monday, May 24, 2010

a. 12 , 20 , 18 , 15 , 10 , 10 , 12

b. 48 ,32 ,67 ,61 ,47 ,95 ,89 ,888 ,1

First (order)

a. 10 ,12 ,12 ,15 ,18 ,20

b. 1 ,32 ,47 ,48 ,61 ,67 ,89 ,95 ,888

a. mean: 14.5 b. mean: 147.56

median: 13.5 median: 61

mode: 12 mode: no mode

range: 10 range: 887

outlier: no outlier outlier: 888, 1

Effect of outliers

Some outliers need to be removed from a data set. This is typically a judgement call.

Outliers have an effect on all measures of central tendency.

http://www.schooltube.com/video/85e9382853d3425594fd/Mean-Median-Mode-Range-Outliers

Homework- Page 444-445 numbers 1-8

www.mytextbook.ca

## Sunday, May 23, 2010

### Effects of Outliers

Outliers have an effect on all measures of central tendency.

***Page 444 - 445, # 1 - 8 is HOMEWORK!**

http://ebook.mytextbook.ca/

***Remember to have all of the number of the day pages complete by Tuesday. Mr. Isfeld will be collecting them.**

## Wednesday, May 19, 2010

### Range and Outliers

**Range -**

The positive difference between the largest and smallest values in a data set

**Eg.**6, 2, 9, 4, 3 - data set

2, 3, 4, 6, 9 - ordered from least to greatest

9 - 2 = 7

The range is

**7**

**Eg.**-8, -1, -3, -5

-8, -5, -3, -1

(-1) - (18) = 7

The range is

**7**

**Outliers -**

A value that is much smaller or larger than the other data values

A data set man have one or more outliers or no outliers

* In other words, it's just like finding something that doesn't belong

*In this case, you are looking for numbers that have a big difference between the other numbers

Find the range-

**a**) 7, 4, 3, 6, 2, 5, 8, 3

2, 3, 3, 4, 5, 6, 7, 8

8 - 2 = 6

The range is

**6**

**b**) 11, 8, 8, 5, 7, 6, 7, 6, 6

5, 6, 6, 6, 7, 7, 8, 8, 11

11 - 5 = 6

The range is

**6**

**c**) -4, 3, -1 , 0, 2

-4, -1, 0, 2, 3

3 - (-4) = 7

The range is

**7**

Find the outliers-

**a**) 18, 19, 79, 17, 20, 12 - 12, 17, 18, 19, 20,

**79**- The range is

**79**

**b**) 14, 14, 16, 15, 1, 16 -

**1**, 14, 14, 15, 16, 16 - The range is

**1**

**c**) 98, 202, 99, 91, 2, 95, 89, 88, 94 -

**2**, 88, 89, 91, 94, 95, 98, 99,

**202**- The range is

**2**and

**202**

## Tuesday, May 18, 2010

### Measure of Central Tendency

-is a value that represents the center of a set of data

-can be median, mode, mean

Remember:

-When given a set of data always reorder the digits from least to greatest.

Median

-the middle number in a set of data after the data has been arranged or ordered, only if there is an odd number of items in the data

-if there is an even number of items in the data the sum of the 2 middle numbers in the data set are divided to get the total

eg. 2, 5, 6, 8, 9, -median is 6

1, 3, 6, 8, 9, 10 -median is 7

-----(6+8)

**÷**2 =7

3, 8, 2, 6, 5, 4, -median is 4.5

2, 3, 4, 5, 6, 8,

----(4+5)

**÷**2 = 4.5

Mode

-the most frequent occurring number in the set of data

-if you find no number that repeats most often, then there is no mode.

eg. 3, 5, 7, 7, 9 -mode is 7

2, 2, 4, 6, 6, 8, 11 -mode is 2 and 6

1, 2, 3, 4 -mode; there is no mode

Try this:

Montreal scored the following goals in their last 10 games

5, 4, 3, 2, 1, 5, 3, 3, 7, 3

-Find the median and the mode:

1, 2, 3, 3, 3, 3, 4, 5, 5, 7

----------(3+3)

**÷**2 = 3

median- 3

mode- 3

Frequency Table

8, 8, 8, 10, 10, 11, 11, 11, 14, 14

----------(10+11)

**÷**2 = 10.5

median- 10.5

mode- 8, 11

Mean

-a measure of rental tendency

-the sum (adding) of a set of data divided by the number of values in set

eg. 4, 5, 8, 9, 9

- 4+5+8+9+9=35

- 35

**÷**5 =7

Try this- mean, median, mode

a) 4, 5, 6, 7, 7, 8, 8, 9, 9

mean-7, median-7, mode-7

b) 250, 250 300, 300, 400

mean-300, median-300, mode-250, 300

## Friday, May 14, 2010

### Homework and extra practice

Try some of these problems for extra practice: Working With Data 1. List all the four-digit numbers that are even, have a 6 in the tens place, and whose digits add to 12. 2. Is 349 ´ 0.9 greater than, less than, or equal to 349? How do you know? ______________________________________________________________ ______________________________________________________________ 3. Suppose you know that 48 ÷ 16 = 3. Without finding the exact answer, tell whether the answer to 48 ÷ 15.99 is greater than, less than, or equal to 3. Why? ______________________________________________________________ ______________________________________________________________ 4. Use the multiplication below to answer the questions that follow. a) Can E be 2? Explain. ___________________________________________________________ ___________________________________________________________ b) What is the value of D? Why? ___________________________________________________________ ___________________________________________________________ c) What is the value of G? How do you know? ___________________________________________________________ ___________________________________________________________

## Monday, May 3, 2010

### Review: Solving One Step Algebra Equations

Remember

-an opposite operation is an operation that "undoes" another operation.

-subtraction and adding are opposites

-division and multiplication are opposites

-whatever you do one side you must do the same to the other side to maintain balance

1st step- isolate the variable/get the letter by itself

2nd step- apply opposite operation

3rd step- check the answer, substitute the answer for the letter of the original equation

A+5=7

-5 -5

A=2

Check your answer:

A+5=7

2+5=7

7=7

To extend our knowledge, we had equations to solve:

a) b-3=5

- +3 +3

- b=8

Check your answer:

b-3=5

8-3=5

8=8

b) c÷3=7

- x3 x3

- c=21

Check your answer:

c÷3=7

21÷3=7

21=21

c) 4d=16

- ÷4 ÷4

- d=4

Check your answer:

4d=16

4(4)=16

16=16

Other examples:

HOMEWORK: Pg. 405=407 #1-21

**Solving One Step Equations**

## Friday, April 30, 2010

### Solving one-step equations

Eg. a + 4 = 12

8 + 4 = 12

12 = 12

Ask yourself what something + 4 = 12 or 12 - something = 4

Try these:

14 = k + 5

14 = 9 + 5

t - 3 = 11

14 - 3 = 11

10 - y = 8

10 - 2 = 8

2. Model (make a picture) and solve

Eg.

Bill rides 4 km to the bridge then rides to work. In total he rides 11 km. How far from the bridge to work?

4 + y = 11

4 + 7 = 11

3. Apply the opposite operation

Eg. c + 22 = 56

- 22 = -22

c = 34

Check- c + 22= 56

34 + 22 = 56

56 = 56

*1st step*- Isolate the variable (get the letter by itself)

*2nd step*- Apply the opposite operation

*3rd step*- Check your answer. Substitute the answer for the letter of the original equation

Opposite operation - An operation that "undoes" another operation

* subtraction and addition are opposites

* division and multiplication are opposites

Solve by applying the opposite operating - Check your answer:

1. n + 7 = 26

- 7 = -7

n = 19

Check - n + 7 = 26

19 +7 = 26

26 = 26

2. d - 3 = -5

+3 = +3

d = -2

Check - d - 3 = -5

(-2) - 3 = -5

-5 = -5

Page 398-401 # 1-22 is HOMEWORK!

http://www.mytextbook.ca/

## Thursday, April 29, 2010

## Tuesday, April 27, 2010

### Soliving Equations

2b + 1 is EQUAL to 5

one way is to for you to use a scale.

[ps , i am sorry I can not do a cup so I am going to draw a square instead]

1c + 4 = 5

1c + 4 = 5

2c(cups) + 3 = 5

Writing expressions - the expression can be writen using a single constant,a single variable or a combination of operations with constants , variables, or numeral co efficent

2 - numerical co efficient

y - variable

7 - constant

Write the following Equation

c + 3 = 7

expression - 3 5

variable - c

numerical coefficiant - 3

constant is - 5

equation - 4 + 10

variable - c

numerical coefficiant -2

constant -4, and 10.

Show using cups + counters

four times a number minus five equals

write an expression or a eqution

I.D variables, numerical coeficents, constands

Websites :

http://www.studygs.net/equations.htm

http://www.sosmath.com/algebra/solve/solve0/solve0.html (might help with future reference.)

I am sorry but I couldn't find a video because they were too advanced

## Thursday, April 15, 2010

### Integers

Zero pair - A pair of integer chips with one chip representing +1 and 1 chip representing.

Opposite integers - Two integers with the same numeral but different signs.

*Positive Numbers move right. Negative numbers move left.*

http://www.mathleague.com/help/integers/integers.htm

http://www.youtube.com/v/27CJH60xwuA&hl=en_US&fs=1&color1=0x402061&color2=0x9461ca

## Wednesday, April 14, 2010

### April 14 2010 Integers

Here's a link to a good site

http://www.mathsisfun.com/positive-negative-integers.html

Sorry about having no pictures something was wrong with saving it.

Remember!!!

Pg.313 to 315 is homework!!!

Comment and suggest if you see any mistakes. Thanks

## Tuesday, April 13, 2010

### Integers

## Monday, April 5, 2010

### Create Circle Graphs

Use a string, compass or trace a circle.

2. Create the Central Angles

- central angle- is an angle formed by 2 radii

- the vertex of the angle is at the centre of the circle

25% like strawberry

25% like vanilla

50% like chocolate

Make a graph for the following info. 3 kids use the computer 1-3 days per week.

9 kids use the computer 0 days per week. 18 kids use the computer 4 or more days per week.

Step 1. Find out how many in total.

3+9+18= 30

Step 2. Convert to %

3 = 1 = 10 10% 1-3 days

30 10 100

9 = 3 = 30 30% 0 days

30 10 100

18 = 6 = 60 60% 4 or more days

30 10 100

%|degrees

100|360

50 | 180

25 | 90

10 | 36

Convert % to degrees.

10% of 360= 36 degrees

use a protractor to measure the central angle

30% of 360= 108 degrees

60% of 360= 216 degrees

Homework

Pages 296-297

Questions 4-13

## Wednesday, March 24, 2010

### Circle Graphs

General

This is more specific

how many were asked? 5oo

Pets of students in Mr. W's class ( 24 students )

Questions.

1) What is the title of the graph? Pets of students in Mr. W's class ( 24 Students )

2) What are the different catagories of the graph? cat, dog, other, no pets.

3) How many percent of the class has a dog? 25%

How many students have a dog? 6

4) How many percent of the class has a cat? 33%

How many students have a cat? 8

5) What percent of the circle is represented by all sectors? 100%

Pages 290-291

http://ebook.mytextbook.ca ( just sign in if you're not finish. )

Link for Circle graphs.

http://cstl.syr.edu/fipse/tabbar/ReadCirc/REVCIRCL.HTM

Video;

http://youtube.com/watch?v=FfpUUAxQcPA

Sorry, just go to the link. it wouldn't let my upload it.

By the way, tell me what i need to improve on. Thaanks :)

### Circle Graph March 24, 2010

A circle graph is a graph that represents data using sections of a circle

Sector - A section of a circle formed by 2 radii and the arc of a circle connecting the 2 radii

Eg. Circle graph

Favourite NFL teams

General

More specific

How many were asked ? 500

Pets of students in Mr. W's Class (24 Students)

Questions

1)What is the Title? Pets of students in Mr. W's Class? Pets of students in Mr. W's Class (24 Students)

2)What are the different categories represented by the graph ? Cat,Dog,Other and No pet

3)What is the percent of the class has a dog?25%

How many students have a dog? 6

4)% of class with cat? 33%

How many students have a cat ? 8

5) What % of the circle is represented by all sectors? 100%

6)no.

Pages 290 - 291

*ps sorry , the pages didn't come up very well. ):

and if i need to improve something please tell me

Link

http://cstl.syr.edu/fipse/TabBar/ReadCirc/REVCIRCL.HTM

Video