Math Is Fun Forum

princess

Member

Registered: 2005-04-11

Posts: 12

Re: Maths!!!!

one more thing. I need help with the problems below:

   The average of 2 and 4 is 3. what is the average of the reciprocals 2 and 4?

princess

Member

Registered: 2005-04-11

Posts: 12

Re: Maths!!!!

please help me, i have one of the most important math tests coming up and i really need help with my math. If i don't pass i'm going to be behind a year on math and my parents won't appreciate that.

MathsIsFun

Administrator

Registered: 2005-01-21

Posts: 7,713

Re: Maths!!!!

The Reciprocals of 2 and 4 are 1/2 and 1/4

To average them, you have to add them together and divide by 2

Add them : 1/2 + 1/4 = 2/4 + 1/4 = 3/4

Then divide by 2: (3/4) / 2 = 3/8   DONE

Makes sense, really - what is half way between 1/2 and 1/4?  3/8

We don't have any worksheets on this, but we have other worksheets for you to practice on here

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"The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  - Leon M. Lederman

princess

Member

Registered: 2005-04-11

Posts: 12

Re: Maths!!!!

oh, i get it. it makes alot more sense then what my teacher told me. Thanks

MathsIsFun

Administrator

Registered: 2005-01-21

Posts: 7,713

Re: Maths!!!!

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"The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  - Leon M. Lederman

princess

Member

Registered: 2005-04-11

Posts: 12

Re: Maths!!!!

i have a question again.

princess

Member

Registered: 2005-04-11

Posts: 12

Re: Maths!!!!

here is 1 of my math questions:

   use a ratio box to solve this problem. In 25 minutes, 400 customers entered the attraction. At this rate, how many customers would enter the attraction in one hour?

please help!!

princess

Member

Registered: 2005-04-11

Posts: 12

Re: Maths!!!!

is any1 there?

princess

Member

Registered: 2005-04-11

Posts: 12

Re: Maths!!!!

look i know ur offline and i'm probally being pushy but when u get online u gotta answer me a.s.a.p. I'm desperate here. I NEED HELP!!!!!!

MathsIsFun

Administrator

Registered: 2005-01-21

Posts: 7,713

Re: Maths!!!!

use a ratio box to solve this problem. In 25 minutes, 400 customers entered the attraction. At this rate, how many customers would enter the attraction in one hour?

25 minutes       400 customers
60 minutes       960 customers

So, 25 is to 60 as 400 is to 960

Or another way of looking at it 25 x 2.4 = 60, so 400 x 2.4 = 960

Or, 25/60 = 400/960

Or ... anything like that

NOW, I am not sure what you have been taught anout "Ratio Boxes" - there can be more than one way to do them, so I hope this matches with what you have been taught.

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"The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  - Leon M. Lederman

mathsyperson

Guest

Re: Maths!!!!

Answering to the puzzle, technically you could do 11+1+3+3+3=21.

MathsIsFun

Administrator

Registered: 2005-01-21

Posts: 7,713

Re: Maths!!!!

Answering to the puzzle, technically you could do 11+1+3+3+3=21.

That must be in response to:

hi
i got a nice problem 4 you.
you got 12 numbers which are
1 1 1
3 3 3
5 5 5
7 7 7
how do you add any 6 numbers to make 21???
Remember no subtraction, division or multiplication and using only 6 numers not more not less..!!!!!!

Good one!

And before j4tt turns up and disagrees, I will say "You Are Right!"

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"The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  - Leon M. Lederman

Roraborealis

Member

Registered: 2005-03-17

Posts: 1,594

Re: Maths!!!!

I disagree.

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School is practice for the future. Practice makes perfect. But - nobody's perfect, so why practice?

Zach

Member

Registered: 2005-03-23

Posts: 2,075

Re: Maths!!!!

I concur with whoever is right.

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Boy let me tell you what:
I bet you didn't know it, but I'm a fiddle player too.
And if you'd care to take a dare, I'll make a bet with you.

Roraborealis

Member

Registered: 2005-03-17

Posts: 1,594

Re: Maths!!!!

I disagree because you cannot use 11.

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School is practice for the future. Practice makes perfect. But - nobody's perfect, so why practice?

Zach

Member

Registered: 2005-03-23

Posts: 2,075

Re: Maths!!!!

Stop trying to steal my Limelight!

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Boy let me tell you what:
I bet you didn't know it, but I'm a fiddle player too.
And if you'd care to take a dare, I'll make a bet with you.

Roraborealis

Member

Registered: 2005-03-17

Posts: 1,594

Re: Maths!!!!

Am I?

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School is practice for the future. Practice makes perfect. But - nobody's perfect, so why practice?

Mr T

Member

Registered: 2005-03-30

Posts: 1,012

Re: Maths!!!!

why can't you use 11? 11 is a number

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I come back stronger than a powered-up Pac-Man
I bought a large popcorn @ the cinema the other day, it was pretty big...some might even say it was "large
Fatboy Slim is a Legend

Roraborealis

Member

Registered: 2005-03-17

Posts: 1,594

Re: Maths!!!!

Any of the six numbers. 11 is not one of them.

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School is practice for the future. Practice makes perfect. But - nobody's perfect, so why practice?

princess

Member

Registered: 2005-04-11

Posts: 12

Re: Maths!!!!

i have another problem again.

the question is:

      collect the terms. x squared + 6x - 2x -12

i just don't understand it

MathsIsFun

Administrator

Registered: 2005-01-21

Posts: 7,713

Re: Maths!!!!

Hi again, princess.

Easy peasy ... just neaten it up, so that "terms" such as x, or x-squared are brought together.

So, you have: x-squared + 6x - 2x - 12

There is just one "x-squared" term, so thats fine as it is
There are two "x" terms, so add them together: 6x - 2x = 4x
And there is just one normal number term (called a "constant"), ie, -12.

So the neatened-up expression is:

x-squared + 4x - 12                 DONE

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"The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  - Leon M. Lederman

Roraborealis

Member

Registered: 2005-03-17

Posts: 1,594

Re: Maths!!!!

Oh, joy!

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School is practice for the future. Practice makes perfect. But - nobody's perfect, so why practice?

Mr T

Member

Registered: 2005-03-30

Posts: 1,012

Re: Maths!!!!

yippee kay yay!!!

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I come back stronger than a powered-up Pac-Man
I bought a large popcorn @ the cinema the other day, it was pretty big...some might even say it was "large
Fatboy Slim is a Legend

stewie

Member

Registered: 2005-03-28

Posts: 820

Re: Maths!!!!

Oh, joy!

Dont steal my saying, u dont even know where its from

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HAPPY HAPPY, JOY JOY 
Fatboy Slim is the band of the 90s, thats if you want to call it a band because its really a one man name

MathsIsFun

Administrator

Registered: 2005-01-21

Posts: 7,713

Re: Maths!!!!

Oh, Yeah, "Happy, Happy, Joy, Joy"

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"The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  - Leon M. Lederman