## Wednesday, May 14, 2008

### Marlon's Scribe Post

*1.**Ms. Enigma said, " Five less than one third of my age is 14." How old is Ms. Enigma*?

Ms. Enigma is_____.<----- your x

x-5, 1/3 x---> x/3 x/3 -5=14 let x= Ms. Enigma's age.

+5 +5 Substitute to check...

x/3=19 x/3 -5=14

x3 x3 57/3 -5=14

x=57 19-5=14

14=14

**Ms. Enigma is 57.**

*2.**Suppose you have $50 and earn $8 per hour. How many hours must you work until you have $170?*

I must work_____.<----- your x

8x+50=170 Let x = hours of work

-50 -50 Substitute to check...

8x=170 8x+50=170

/8 /8 8(15)+50=170

x=15 170=170

**I must work 15 hours.**

**3.**Valley Vudei charges a $12 annual fee plus $3 per movie for rentals. Last year., Jennifer spent $90 at the store. How many movis did she rent?Jennifer rented_____.<----- your x

3x+12=90 Let x = # of rented movies

-12 -12 Substitute to check...

3x=78 3x+12=90

/3 /3 3(26)+12=90

x=26 90=90

**Jennifer rented 90 movies.**

**4.**Kimo's car needed work. The mechanic charged him $130 for parts plus $40 per hour for labour. If the bill totaled $270, how many movies did she rent?Kimo will labor_____.<----- your x

40x+130=270 Let x = hours of labour required

-130 -130 Substitute to check...

40x=270 40x+130=270

/40 /40 40(3.5)+130=270

x=3.5 270=270

**Kimo will labor 3.5 hours.**

**5.**Suppose you are a salesperson for Quark Computer company. Each month you earn $400 plus one sixth of your sales. What amount must you sell this month to earn $2000?I must sell_____.<----------- your x

1/6 x-->x/6 x/6+400=2000 let x = amount I must sell

-400 -400 Substitute to check...

x/6=1600 x/6 + 400=2000

x6 x6 9600/6 + 400 =2000

x=9600 2000=2000

**I must sell 9600.**

*-Marlon*## Tuesday, May 13, 2008

### Kat's Scribe

May 13, 2008

2. The length of a rectangle is 5m greater than the width. The perimeter is 150m. Find the width and length.

3. The width of a rectangle is 12 cm less than the length. The perimeter is 156cm. Find the width and length.

4. The length of a rectangle is 2cm less than 7 times the width. The perimeter is 60cm. Find the width and length.

BUT WAIT!!

And now back to the questions.

1. The length of a rectangle is 3 times the width. The perimeter id 96cm. Find the width and length.

2. The length of a rectangle is 5m greater than the width. The perimeter is 150m. Find the width and length.

3. The width of a rectangle is 12 cm less than the length. The perimeter is 156cm. Find the width and length.

4. The length of a rectangle is 2cm less than 7 times the width. The perimeter is 60cm. Find the width and length.

## Wednesday, May 7, 2008

## Monday, May 5, 2008

## Sunday, May 4, 2008

### Charity's Scribe

For question 6 I got it wrong because I was supposed to put the 7 infront of 4x

So as you can see I would have gotten it right if only I wrote them opposite from each other.

I got write the algebriac expression or equation for the pattern you notice wrong because I rushed and The answer on the very right lower corner isn't even understandable.

My T-Chart has the (x) axis on the left and the (y) axis on the right because that is the order it has to be in.

## Friday, May 2, 2008

## Thursday, May 1, 2008

### Chaseley's Scribe

Car Repairs

when you draw a t-table you have to make sure x is on the right if you are doing it from top to bottom. When it is laying down make sure the x is on the bottom.

When I said add one to figure number i meant to add one to x ( 1 + 1) . Then add 2 to y (1 + 2 = 3)

The algebraic expression I found was 2x - 1 =y.

Then I drew a chart to explain my answers.

When you draw a chart make sure you have your labels or you'll lose marks. When you number your chart always check if you marked it right on the line, not in the center. For "y" make sure you don't go up by 1,3,5,7,9,11. go up by 2's 3's 4's 5's or which ever way fits best. In this chart going up by 2's are the best.

### Dhonell's Scribe Post

**Terms**

Variables- n/x/any letter- any number can be a variable

Constants- +1/-1 -the number that never changes

**Intergers**

When you have intergers, think money.

- = owe money

+ = have money

Somethings to know before doing these qustions.

1 .Simplify liked terms

2 .Always try to have one variable & one constant on the other side of the equal sign.

3 .Variable goes first.

Here is some of the questions:

**Example 1:**

Then you notice that i put a red X through the white and green variable. That shows that there was a zero pair.

Next you simplify the liked terms. Where you get one positive variable and one negative 1.

**Death Blow of Interger**

**s**

6 -(-3) When you see there are (-) signs touching, it means you can add.

6 + 3 = 9

6-(-1) = 7 Notice how the -(- looks like a plus sign. Thats a key trick when remembering (-) touch mean adding.

**Conclusion**

In class, we learned about algebra and got a ton of homework. Which im almost done so go me ! And thats all of my scribe post.

### Marlon's Scribe

*Pg 1*

*Write*the following expressions in words

*Pg 2*

**Create a chart**that shows the first 10 terms of the pattern.

**3**

**Marks**

**Write the algebraic expression**for the relationship between the hours spent walking and the number of kilometres walked.

**3 Marks**

**determine how far they could walk after 50 hours. 2 Marks**

**Whole Test /16**

## Saturday, April 19, 2008

### Jessica B's B.O.B.

## Thursday, April 17, 2008

### Jessica Q's Scribe Post

**Circumference of a Circle:**

- The
**circumference(c)**of a circle is the distance around the circle.*c = 2πr* - The
**radius (r)**of a circle is the distance from the center of the circle to the outside. - The
**diameter(d)**of a circle is the length of half of the circle or twice the length of the radius. **π**or pi is a constant and is approximately equal to 3.14**FORMULA:***Radius: d / 2*

Diameter: 2 x r

Circumference: 2 x π x r

Area of a Circle:

Area of a Circle:

**Radius²**- Area of a circle

- Area of circle = πr²

**π (Pi)**- 3.14

**The Area**- (3.14)(r²)

**Surface Area of a Cylinder:**

Volume of a Cylinder:

Volume of a Cylinder:

**Formula:**

Volume = Area of base x height

## Tuesday, April 15, 2008

### Chaseley's BOB

Surface Area Of a Rectangular Prism

surface area is the total amount of area a whole 3D shape contains.

formula: area front + area back+area side+ area side2+area top+area top+area bottom.

area front + area back = L x W

area side + area side2 = W x H

area top+ area bottom = L x H

SA = area front + area back+area side+ area side2+area top+area top+area bottom. SA= 2 (L x W) + 2(W x H) + 2 (Hx L)

SA= 2 (4cm ² x2cm ²) + 2 (4 cm ² x 2 cm ²) + 2( 2cm ² x 2cm ²)

SA= 2 (8cm ²) + 2 (8 cm ²) + 2 (4 cm ²)

SA= 16cm ²+16cm ²+8cm ²

SA= 40 cm ²

looks complicated ? REALLY ITS NOT :)

___________________________________________________________

volume of a rectangular prism

V=(L X W) x H

V= (17cm ² x 11 cm ²) x 1 cm ²

V= 187 cm ² x 1cm ²

V=187cm³

Volume is the amount of space an object takes up.

FORMULA: LxWxH= volume³

## Monday, April 14, 2008

### Anthony's BOB

It was working at my house, but when I tried it at school and it wasn't working.

If you can't see it ill try to make another one...

### Dhonell's Bob

Volume is how much the entire shape takes up. To get the volume of a rectangular prism, you multiply the length (L), width (W), and height (H). That will get you the volume of the entire shape. The answer, is always cubed or in 3. ex. 18 cubic(3) centimeters.

### Kate's BOB

To find out the Surface area of a Rectangular Prism the first thing you have to do is make your object into a net so it looks like this:

(Surface Area : Surface area is the measure of how much exposed area an object has)

After Laying out your Rectangular Prism into a net you have to find the area of each shape. So to find the surface area of the whole object you have to find the area of each shape and add them together like this:

The Front and back Area = 8 x 4 = 32 cm ²

The Sides Area = 8 x 4 = 32 cm ²

The Bottom and the Top Area = 4 x 2 = 8 cm ²

Then you multiply each one by two becuase there are two of the same shape. It makes things easier.

32 x 2 = 64

32 x 2 = 64

8 x 2 = 16

Then you add all of those up and that gives you your surface area!

64 + 64 + 16 = 144 cm ²

Finding the Volume of a Rectangular Prism

To find the Volume of a Rectangular Prism is quit simple all you got to do is follow this formula:

Length x Width x Height = Volume

(Definition of Volume: The amount of space, measured in cubic units, that an object or substance occupies)

Now all you got to do is plunk in your numbers and do the math

Height x Length x Width = Volume

10 cm x 6 cm x 4 cm = 240 cm ³

(Since it is a three dimensional object we put cubed or ³)

Thats all you have to do :)

### Marlon's Bob

*Surface Area and Volume*

*Surface Area*I learned to get the surface area of a 3 dimensional shape. Lets say you have a rectangular prism, you first need to make the prism into a net. Now you have to find the front area, the back area, the top area, the bottom area, and both of the sides areas. The easier way is to find the area of the top area then double it, then double the area of the top area and find the area of one side then double it since theres two of everything. So it would look like this,

*Volume*I learned to get the volume you need the formula L x w x h = v. For example if you had a book flat on the table with the length=18 cm, the width=21, and the height=6 you would use this formula.

It is cm3 (or cubed) because it is a 3 dimensional shape.

### Mary's bob

Surface area is the area of the surface on a rectangular prism .

Surface area = Length x height

= 2cm x 2cm = 4squaredcm

= 4squaredcm x 2 = 8squarecm

= 6cm x 2cm = 12squarecm

= 12squarecm x 4 = 48squarecm

Surface area = 48squarecm

The volume of a rectangular prism is how much space it takes up .

Volume of rp = length x width x height

length = 6cm

width = 2cm > 6 x 2 x 2 = 24squarecm *

height = 2cm

Volume of rp = 24squarecm

### Dharyll's B.O.B.

Surface Area = 3 + 3 + 3 + 3 + 3 + 3 = 24 cm2

### Jocelyne's B.O.B.

SURFACE AREA:

The surface area is the area of the outside part of a shape. For a rectangular prism it would be the 2 sides, the top and bottom, and the front and back. A net is an easy way to show the rectangular prism's area .

The formula for this would be :

**surface area** = area top + area bottom + area side + area side² + area front + area back**OR**

**surface area**= 2(L x W) + 2(H x L) + 2(H x W)

= 2(4cm x 2cm) + 2(2cm x 4cm) + 2(2cm x 2cm)

= 2(8cm) + 2(8cm) + 2(4cm)

= 16cm² + 16cm² + 8cm²

= 40 cm²

You can use the formula examples i showed you here to help you answer your own surface area question.

VOLUME:

The volume is the measurement of how much space the shape takes up. The answer is always cubed or in an exponent ³.The volume of a rectangular prism would look like this.

The formula for this would be:

**volume =**L x W x H

= 3cm x 2cm x 2cm

= 12 cm³

**OR**

volume= area of base x height

volume

= 6cm² x 2cm

= 12cm³

### Jeanine's BOB

Surface Area of a Rectangular Prism:

Surface area is the total area of the prism. The measurements from the net all added up.

Surface Area = lengthxheight

= 4 cm x 4cm = 16cm(2)

=8cmx4cm=32 cm (2)

Then you add them all up.

16+16+32+32+32+32= 160cm(2)

Volume of a Rectangular Prism:

LxWxH

(lengthxwidthxheight)

8x4x16 = 512 cm (2)

base = 96cm(2) ( you add up the three rectangles across the middle )

height = 16 cm(2)

96x16 - 1536

Volume = 1536 cm (2)

## Thursday, April 10, 2008

### Robbie's Scribe

## Tuesday, April 8, 2008

### Dhonells Scribe Post

**My First Shape :**

**My Next Shape Was :**

My Final Shape Was:

My Final Shape Was:

Those were the shapes I had to do for the scribe. Sorry I didn't post this earlier.