Lalopoulou's Scribe Post

Finding C [ all the 2's in this thingy are an exponent.]

eg. 1

Here is the diagram.

Its a bad diagram. But i hope you can at least see it. lol okay well here is the math work::

You know that: a2+b2=c2

42+32=c2

[4x4] + [3x3] = c2

16 + 9 = c2

c2 = 25

the square root of 25 is 5 so the answer is 5

back to the diagram

...

*Equivalent Fractions!!!

WHAT are they ?

ONE HALF and TWO QUARTERS equal the same thing because HALF OF FOUR equals TWO. Half of a half is one quarter, so two quarters equal a half. As I have just proved here, equivalent fractions are two or more fractions with the same value. They are the same besides the fact that the sizes/pieces are smaller. Think of it as a cake. The more people you have to share with, the smaller the pieces get.


This album is powered by BubbleShare - Add to my blog

The best way to find equivalent fractions is to reduce the two or more fractions into their smallest value. I showed this in my bubbleshare using pictures =) Okay, so this post is finally done =)

Scribe 03/05/07

SUPRIISE its mee =) .. we did a test today .. it was about fractions and we got the whole class to do it .. homework is DO THE BIG PAPER .. its DUE ON TUES. MARCH 6 / 07 .. ALSO .. its MONIQUES birthday tomorrow .. so HAPPY BIRTHDAY =) .. okay thats all =)

Lalopoulou's Scribe Post

Well we didn't do much this afternoon except listen to Hanly preach about math. All we did was explain the definition of proper fraction, improper fraction, mixed fraction and equivalent fractions. Oh and you had to show an example for each one too on the big piece of paper Hanly gave everybody. Hanly also gave out some kind of purple booklet and said that page c-21 and c-22 are homework and probably due next math class. Well thats basicly all i have to say.... oh and don't forget tomorrow is activity day! so bring money!


Oh and the next scribe is ............Smillies!!!

question 6

Just watch the bubbleshare I did to see how I solved question 6. Please leave comments =)

This album is powered by BubbleShare - Add to my blog

Question #11 [V 1.0]

Everything is in the bubbleshare.

This album is powered by
BubbleShare
- Add to my blog


So like above, I just find the percent of what im trying to subtract and then I subtract it.

-----------------------------------------------------------------------

[V 1.0] -put in bubbleshare, finished.

Question 12

The Cumulative Question 12

Dave interviewed a number of students in his school regarding their favorite ice cream. Dave claimed that exactly 40% of the 37 students interviewed liked vanilla the best. Is it possible to determine whether David's claim is correct? Why or why not?

To answer this question I used ratio table and x k y chart. The bubbleshare below shows my work. I did it step by step so you guys can understand it.




This album is powered by
BubbleShare
- Add to my blog

So from the bubbleshare above, you can see that 40% of 37 students is 14.8 .To double check my answer I used cross multiplying and equivalent fractions. I also did it step by step so it is easier to understand and follow.




This album is powered by
BubbleShare
- Add to my blog

So by double checking I am now sure my answer is correct. So 40% of 37 students is really 14.8.

If then the answer is 14.8, that will prove that David's is INCORRECT! His claim is that exactly 40% of his 37 interviewed students liked vanilla best. Since we are talking about students we can't have decimals. So that proves that he is incorrect.

If David argued that my reasoning is wrong and he suggested that I round it. Then I'll prove to to him that even if you round it he is still wrong. Look below!

Round 14.8 = 15

40/ 100 = 0.4

0.4 x 100 (percent is out of 100) = 40%

15/37 = 0.405405405

0.405405405 x 100 (percent is out of 100) = 40.5405405%

Then if you round 40.5405405% to the nearest ones, you'll get 41%

Therefore David is INCORRECT!

IF I MADE A MISTAKE, I WOULD APPRECIATE IT IF YOU TELL ME.

Question #10

10. An ice chest contains 9 can of apples juice, 8 cans of grape juice, 7 cans of orane juic, and 5 cans of pineapple juice. Suppose you reach into the container and randomly select a can. What is the probability that you will pull a...

- apple juice
- grape juice
- pineapple or orange juice

The top is the part and the bottom is the total. The number cans of apple juice is 9, and the total number of cans is 29. Scince we're finding the percent, we divide 9 by 29, which gives us 0.3103... then we multiply 0.3103 by 100, (because percents are always out of 100) which gives us 31.03%. The probability of getting a can of apple juice is 31.03%


This is pretty much the same as the first one, except the numbers are different.
8 divided by 29 equals 0.27.58. 0.27.58 multiplied by 100 equals 27.58%.
The probability of getting a can of grape juice is 27.58%.



(Pineapple and Orange Juice) .. This one is a little bit different. The questions asks for the probability of pineapple OR orange juice. So you combine both. 7 cans of orange juice plus 5 cans of pineapple juice equals 12 cans. 12 divided by 29 equals 0.4137. That, multiplied by 100 is 41.37%. The probability of pulling out a can of pineapple juice or a can of orange juice is 41.37%.


If you see any errors please feel free to comment on it. =)
By: M.Dela Cruz

math blog thingy

o Find the mean, median and mode for the following questions,.
1. 1,2,3,4,5,5,6,7,8
_
Mean; 4.3
Median; 5
Mode; 5

2. 4,4,12,16,19,22
_
Mean; 73.6
Median; 14
Mode; 4

3. 45,45,60,75,78,78

Mean; 52.1
Median; 67.5Mode; 45 + 78

-JESSICAGINGRAS

Scribe - Feb. 7/07

Your scribe for today will be me.. since i didn't do yesterday afternoon's scribe. Now what did we do today in math?..

oh, yeah.. TEST!!

well. that is pretty much what we did for the whole math period.

Scribe Post for this afternoon

Today in math class Harbeck gave us a quiz in the morning. In the afternoon Harbeck told us about the test that he's going to give us. The test is out of 36 but there is going to be 4 bonus quetions. So it makes the test out of 40. Harbeck also told us about a BOB. BOB stands for Blogging On Blogging, which doesn't makes sense. Anyways, in this post you will write a reflection on this whole unit that we have been doing for a month now. You must lable this post BOB or else Harbeck will get mad. In this post you must write/type a reflection on how you think you did in this unit. An example would be: I think I did well on ____________ since we started the blue book because____________. I think i could of done better on ___________.

Oh i also remeber than in class Harbeck was yelling at Sarika for making him repeat was he said over again cuz she has "bad hearing".

Here are the answers the the first 5 questions:

1. lbs/$ = 6/9 = 21/31.5

2.ft2/$ = 5000/24 = 30 000/114

3. ft/$ = 20/180 = 300/2700

4. inches/feet = 1/5 = 8.5/42.5

5. sales tax/purchase = 4/50 = 96/1200

Unfortunately i coudn't get the rest of the question done. Sorry for making the pictures hard to see! Oh and the next scribe is Ardia! bwahahahahahahah!