Janns Scribe

Hi, My scribe today is about that sheet that Mr . Harbeck told us to answer. The sheet I got was page 48 so if my questions are different than yours... too bad.

1. Enigma is __57___ old
Let x = age
- 1/3 x - 5 = 14
- x/3 - 5 = 14 + 5
- x = 19 x 3
- x= 57
- x/3 - 5 = 14
- 57/3 - 5 = 14
- 14 = 14

3. She rented ___26___ movies
Let x = movies
- 3x + 12 = 90
- 3x + 12 = 90 - 12
- x = 78/3
- x = 26
- 3x - 12 = 90
- 3(26) + 12 = 90
- 90 = 90

6. He ate ___22___ Chips
Let x = Chips
- 12x + 375 = 639
- 12x + 375 = 639 - 375
- x = 264/12
- x = 22
- 12x + 375 = 639
- 12(22) + 375 = 639
- 639 = 639

8. It took __13 _ Min.
Let x = minutes
- 25x + 75 = 400
- 25x + 75 = 400 - 75
- x = 375/26
- x = 13
- 25x + 75 = 400
- 25 (13) + 75 = 400
- 400 = 400

9. They need ___10800 wrapping paper
Let x = Wrapping paper
- 1/2 x - 400 = 5000
- x/2 - 400 = 5000 + 400
- x = 4600 x 2
- x = 10800
- x/2 - 400 = 5000
- 10800/2 - 400 = 5000
- 5000=5000

Just comment if i did something wrong. Thanks!

Kevin Y's Scribe

My scribe is about Distributive Property

Terms that have the same variable parts are called like terms. The terms 2x, 4x, 5x are like terms. Unlike terms are 6x, 3x(squared), 4y. Only like terms can be combined.

To expand an expression with brackets means to remove the brackets by multiplying. This is done using the distributive property.

Distributive Property has 3 ways to do it.

For example for 3(y + 6)

Way #1

3(y + 6) = 3y + 4 x 6

= 3y + 18

Way #2

Way #3
x + 6
x + 6
x + 6
3x + 18

So Distrubtive Property is basicaly expanding the expression.
The best way to use distrubtive property will probably be Way #3 and #1 if Way #2 helps you understand better then use it.

Janns Scribe Post

Sorry this scribe was waaay late

This scribe is about the algebra test 2.0 and ill tell you all about it and what the answers are!

This is part 1 of the test ill give you 3 possible answers for each one.

1) 2x-9 - 2 times a number decreased by 9
- twice a number decreased 9
- 2 groups of a numbers decreased by 9

2) 10-4x - 10 decreased by 4 times a number
- 10 decreased by 4 groups of a number
- 10 deminished by 4 sets of a number

3) 5(x-8) - 5 groups of the difference of a number and 8
- a number decreased by 8 times 5
- 5 times a number decreased by 8

4) 7(x+5) - 7 sets of the sum of a number and 5
- the sum of a number and 5 times 7
- a number combined with 5 times 7

This is part 2 of the test , there is only one answer possible for each
5) 6 centimeters more than two thirds of length X = 6 + 2/3 X
6) three times the sum of a number and 2 = 3(n+2)
7) nine decreased by 2 times a number = 9 - 2n
8) four less than five times a number = 5n - 4

This is the chart questions on the other page.

The following Graph shows the first 4 terms of a pattern

A) Create a Chart that shows the first 10 terms of the pattern



B) Write the algebraic Express for the relation ship between hours spent walking and the number of kilometres walked

- Hours x 4 -1 = Km walks
- 4x -1 = y
X = hours
Y= Km walked

C) Using your algebraic expression determine how far they could walk after 50 hours

50 = 4x - 1
= 4(200) - 1
= 199 Km

This test was out of 16. Thanks!

Kevin T's Scribe

Todays class is about the surface area of a cylinder.

The Net of a cylinder

the cylinder has 3 shapes, 2 circles and a rectangle. To get the surface area of a cylinder follows this formula:

SA = (Pi x r²) + (2 x Pi x r) + ( Pi x r²)

In class we had a an example question: the height is 10 and the radius is 5. The circumference is the length of the rectangle so you get the area of the 3 shapes and add them together to ge the Surface area.

SA = (3.14 x 25) + (2 x 3.14 x 5) + ( 3.14 x 25)
= 78.5 + 314 + 78.5
= 417

jordan's scribe post

Worksheet B

Question:

You've just picked up a ground ball at first base, and you see the other team's player runnig towards thrid base. How far do you have to throw the ball to get it from first base to thrid base, and runner out?
Answer: Description of the picture

first, I wrote the Pythagorean theorem and then, i replaced the a squared and b squared to 90 because the legs are 90 squared. second, I solve the exponent numbers and then I add the answer to get 16200. third, i have to find the square root of 16200 in fraction and decimal form. for the fraction i use the chart to find it, i know that 127 is between 11 and 12 so my whole number is 11, to find the numerator i count how much needed to be 127, to find the denominator i add the bottom in the perfect square.

(click the picture to enlarge and see the solution)

Jann's 2nd Scibe

Sorry this scribe is late, i forgot to finish it during the weekends.
Well, this scribe is about the Pythegorean Triple.

First, What is the Pythergorean Triple?

The Pythegorean Triple is a right angle triangle that uses a set of numbers such as 1,2,3,etc. This set of numbers has to be a decimal, also this set of numbers has to satisfy a² + b² = c²

For example, this set of numbers can be 3,4,5. Since 3² is equal to 9, 4² is equal to 16 and 5² is equal to 25. a² = 3 , b² = 4 , c² = 5²

If you put that in a diagram it would look like this...

You notice that C² is always the hypotinus. The hypotinus is the the line conecting 3² and 4² together, The vertical line and the horizontal line can be a² or b² usually, the vertical line is a² and the horizontal is b².

Lester's Scribe

my scribe is question 4 and 9 in the C66 Paper that mr harbeck gave us

Question Number 4
BubbleShare: Share photos - Green Toys



Question 9
BubbleShare: Share photos - Green Toys

Karla's Scribe Post

Today we were told to anwer 5 questions from the paper that was givento us and we need to answer it into 2 different ways. In this scribe post 2 examples of the word problems are disscussed.

Q1:Andrea cur 62 1/2 inches of ribbon into 4 equal hair ribbons. How long was each hair ribbon?

Answer: Each ribbon would be 15 5/8 inches long.

Solution#1:

1. change mixed fraction to improper fraction

2. get the reciprocal of the divisor which is 4 becomes to 1/4

3. do multiplication

4. simplfy your answer

Solution#2:

1. change mixed faction to improper fraction before doing the ratio table.

2. on the right side divide 4 by 4 or multiply by 1/4 to get 1 as your answer.

3. on the left side do the same thing and simplfy your answer.

Q2:Dawn has 12 yards of silk. She needs 1 1/4 yards of silk to make one skirt. How many skirts can she make?

Answer: She can make 9 3/5 of skirts.

Solution#1:

1. change mixed fraction to improper fraction.

2. then get the reciprocal of the divisor which is 5/4 becomes 4/5.

3. multiply the fractions.

4. simplfy your answer.

Solution#2:

1. change the mixed fraction to improper fraction before doing the ratio table.

2. on the right side multiply 5/4 by 4 which gives you 20/4

3. then divide it by its denominator which is 5 and gives you the answer of 1.

4. do the same thing on the left side and simplfy your answer.

Mya B`s Scribe ,

This scribe is about Ratio tables,How many groups of ___ are in ___ ?. , dividing , and multiplying.
So, the question would be how many groups of 1/8 are in 2/5 ?
















How many groups of 1/2 are in 3/4?,












How many groups of 2/3 are in 2/9 ?













How many groups of 3/4 are in 5/6?,

KevinT's Scribe

Scribe on four 4s

1. How to get zero

















2. How to get 1.


















3. How to get 2.








4. How to get 3.
















5. How to get 4.
















6. How to get 5.









7. How to get 6.









8. How to get 7.









9. How to get 8.









10. How to get 9.

Kadille Dave's Scribe Post

This scribe is all about paints used in a part of a room.

here is the problem:

if you can paint 2/5 of paint can, in a quarter of a room, how many paint can/s will be used when you will paint a whole room?

to answer this problem, one strategy can be used in solving this problem. it is ratio table. the picture shows how this problem will be solved. but the answer is not yet shown, it only showed how to get the whole room (1/4 x 4). to make 1/4 into a whole number which is one, the numerator and the denominator must be the same so since it was 1/4, we multiply it into 4 to get 4/4 or 1....one thing in ratio table is that when you do it in one side, do it on the other side. so we multiply the number 4 too, to answer the question.






this is to show how you multiply the fraction to 4... and 2 2/3 is the answer to this problem that can paint the whole room












this shows the answer..,.its done...the answer is
2 2/3

Angelo's scribe

Today, Mr Harbeck was away (AWWWWWWWWWWW) so we just did fraction word problems.
I'll show you how I did three of them:



Explanation1: I needed to find out 3/8 of 24, so i first divided 8 to 24. The answer was 3, and that meant 3 is 1/8 of 24. So, to get 3/8 i had to times 1/8 three times. That's why i did 3 times 3.



Explanation2: I needed to find out 3/5 of 125, so i first divided 5 into 125. The answer was 25, and that meant 25 is 1/5 of 125. So, to get 3/5 i had to times 1/5 three times. That's why i did 25 times 3.



Explanation3: I needed to find 7/8 of 160, so i first divided 8 into 160. The answer was 20, and that meant 20 is 1/8 of 160. So, to get 7/8 i had to times 1/8 seven times. That's why i did 20 times 7.

This is how I did my questions. Hope you guys agree!

CARL873's scribepost

7)There are 25 pupils in the class, 3/5 of the pupils support Chelsea and the remainder support Arsenal. how many pupils support Arsenal?













8)The local normally sells Mars bars for 40 pence. The shopkeeper says I can buy them for 1/4 less than the normaal price. How much can I buy a Mars bar for?












9) Last year, Mr Murrin weighed 60 kg. This year he weighs 2/5 more. How much does Mr Murrin weigh this year?

jordan's scribe

the thing we did today in class was a question sheet about how do we use the method that Mr harbeck taught as. here is some question we did......

4. The weather fore caster says that it is 20 c in london but only 7/10 as hot in new york. how hot is it in new york?

answer: 14* c hot in new york

5. Skateboards cost $36 each in my local store. the shopkeeper says if i buy one I can buy another for only 7/9 of the normal price. How much would a second skateboard cost?

answer: $28 if you buy a another one.

6.Billy collected 256 conkers but lost?2/4of them in his way to school through a hole in his bag. When he arrived at school how many conkers did billy have left?
( you can choose any fraction you want to subtract to 256).

answer: 128 conkers left.

Jullian's Fraction word PROBLEMS

The thing we did today in class was a question sheet about adding, subtracting, multiplying fractions. Here are some of the questions we did....

Question Number#

10. McDonalds sell milkshakes in two sizes. A small milkshake contains 300ml and a large milkshake contains 2/3 more.
(i) How much does a large milkshake contain? 500ml
Because a 2/3 of a small milkshake is 200 then I added it with 300 because it is more than the small milkshake 200ml+300ml=500ml.

(ii)If Mr.Murrin drinks 2/3 of a small milkshake and Miss Hoyne 1/2 of a large milkshake who drinks the most? Miss Hoyne drinks the most because, 2/3 of Mr.Murrins 2/3 of 300 is 200ml and Miss Hoyne's 1/2 of the 500ml milkshake is 250ml.


11. Half a can of paint covers 1/3 of a room. How much paint is needed to cover the whole room? 1 and 1/2 of paint is needed to paint the whole room.....

Ivanne's Scribe Post

Today, we learned how to multiply mixed numbers. Here are the steps in multiplying mixed numbers.

Example:
1 1/4 x 1 1/2

First, you have to convert the mixed numbers to improper fractions.

Denominator x Whole number + Numerator

1 1/4 = 4 x 1 + 1 = 5/4
(4 multiplied by 1 equals 4 plus 1 equals 5. The denominator stays the same.)
1 1/2 = 2 x 1 + 1 = 3/2
(2 multiplied by 1 equals 2 plus 1 equals 3. The denominator stays the same.)

Now, we have 5/4 x 3/2.

Second, you have to multiply the numerators.












5 x 3 = 15

Third, you have to multiply the denominators.












4 x 2 = 8

Now, we have 15/8.

Fourth, we have to simplify the answer. To convert an improper number to mixed number, we have to divide them.












The answer will be the whole number, the remainder will be the numerator, and the divisor will be the denominator. So, we now have 1 7/8.

1 1/4 x 1 1/2 = 1 7/8



We can also use the numerator swap...

Example:
2 1/5 x 1 2/3

We will do the first step...convert the mixed numbers to improper fractions.

2 1/5 = 5 x 2 + 1 =11/5
1 2/3 = 3 x 1 + 2 = 5/3

Now, we have 11/5 x 5/3.

To multiply the fractions easier, we will do the numerator swap.

11/5 x 5/3 will become 5/5 x 11/3.

Now, we have to simplify these fractions.

5/5 = 1
11/3 = 11/3

Our fractions now are 1 x 11/3.

To multiply a whole number and a fraction, you just need to put 1 as the denominator of the whole number.












Now, we have to multiply the numerators..













1 x 11 = 11

And the denominators..












1 x 3 = 3

**Or you can just multiply them like 1 x 1/3 and the answer is 1/3 because any number you multiply by 1, the answer is always the number.

We now have 11/3. We need to simplify them.













So, 2 1/5 x 1 2/3 = 3 2/3

Anne's Scribe

Today we learned about multiplying fractions. We made a pamphlet yesterday and filled in boxes. In one particular box we talked about Standard Algorithim and Array Models to help us multiply fractions easier and with better understanding.

In that box we learned about making ugly fractions into friendly fractions. How to do that was to take an ugly fraction (for example) 20/33 x 11/30. Those are what you can call ugly fractions! To make it easier for you and other people, you can just do a numerator swap (as Mr. Harbeck says) with the 20 and 11. So now your fraction is 11/33 x 20/30.

Now you can simplify both fractions. 11/33 can be simplified into 1/3 because 33 can be divided by 11, and 11 can be divided by 11. Or, 11 can fit into 33, 3 times. Or another way to show that it can be changed into 1/3 is because 11 and 33 is divisble by 11. 20/30 can be simplified into 2/3 because they are both divisible by 10. 10 fits into 20, 2 times. 10 fits into 30, 3 times. How hard was that?!

Now the final step is to get both fractions and multiply them. Now you are ended up with a much more easier and pretty fraction. Get ready for extreme multiply makeover! 1/3 (11/30) x 2/3 (20/30). Since we already talked about multiplying fractions by using cross multiplying we can now get a fraction without having to multiply large, ugly numbers. Wasn't that easy?!


click for a picture http://www.freewebs.com/annev/math.JPG

Jomarie's Scribe

Today in class we learned about Multiplying & Dividing - Standard Algorithm and Array Models.

Standard Algorithm is basicly multiplying the numerators, multiplying the denominators and simplifying your answer if possible. The example we did together was 2/3 x 1/2 = __. Which the answer is 1/3. How we got it is....

Array Model is a picture (rectangle shaped) showing your answer, in picture form. It is basicly multiplying the denominator to make a large rectangle and multiplying the numerator to make a small rectangle (most likely inside the large rectangle). The example was the same thing, 2/3 x 1/2 = __, but you have to show it in picture form.

Mariya's Scribe

today, we learned about adding fractions.
mr harbeck showed us how to add fractions with an example. our example was 4/5 + 8/15. we knew that 4/5 + 8/15 didnt equal to 12/20. so, what we did was find a common denominator. so, 4/5 became 12/15. what we did to get 12/15 was that we multiplied 4/5 by 3. now, we can add the two fractions. so, 12/15 + 8/15 added up to 20/15. 20/15 is an unpropper fraction so we changed it to 1 5/15 or simplified it to 1 1/3.

today, we also did another investigation. in today's investigation, we are doing a problem in two places in Brooklyn, Carrol Garden and Flatbush. what we know about the two places is that the community wants to build a park for their neighbourhood and both of their space for the park is 50 m by 100 m.
In Carrol Garden's, 3/4 of the lot is devoted to a playground and 2/5 of the playground is blacktop.
In Flatbush, 2/5 of the lot is devoted to a playground and 3/4 of the playground is blacktop.

these are our questions.
- is one neighbourhood getting more blacktop than the other?
- is there more blacktop space in one lot than in the other lot ?
- how would you convince the people in the two neighbourhoods that your conclusion is correct ?