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Forums - General - Mathematical dispute

Boutros on 29 July 2012
Jay520 said:
Boutros said:
Jay520 said:
I believe the answer is 2. My math teacher once told me that an X(Y) bond is of a higher priority than an X*Y. I believe he said that on the PEMDAS, X(Y) is somewhere between parentheses and multiplication. He wasn't the smartest Mathemagician, but I thought that this made sense.

If you use the distrubutive property, the answer is two. And I don't think properties will disturb the solution, right?

48 / 2(3 + 9)
48 / (6 +18) - You could distribute the 2 here.
48 / 24
2

I think it makes sense. You can't just break the bond between the 2 and the ( ). I've never seen the bond broken like that before. But im not sure, it might be 288. Either way, its a poorly formed equation.

Look at my post above.


But you can implement properties anytime without disturbing the solution, right?

What do you mean?



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Jay520 on 29 July 2012
Boutros said:
Jay520 said:
Boutros said:
Jay520 said:
I believe the answer is 2. My math teacher once told me that an X(Y) bond is of a higher priority than an X*Y. I believe he said that on the PEMDAS, X(Y) is somewhere between parentheses and multiplication. He wasn't the smartest Mathemagician, but I thought that this made sense.

If you use the distrubutive property, the answer is two. And I don't think properties will disturb the solution, right?

48 / 2(3 + 9)
48 / (6 +18) - You could distribute the 2 here.
48 / 24
2

I think it makes sense. You can't just break the bond between the 2 and the ( ). I've never seen the bond broken like that before. But im not sure, it might be 288. Either way, its a poorly formed equation.

Look at my post above.


But you can implement properties anytime without disturbing the solution, right?

What do you mean?



http://www.purplemath.com/modules/numbprop.htm

Cobretti2 on 29 July 2012



 

 

Boutros on 29 July 2012
Jay520 said:
Boutros said:
Jay520 said:
Boutros said:
Jay520 said:
I believe the answer is 2. My math teacher once told me that an X(Y) bond is of a higher priority than an X*Y. I believe he said that on the PEMDAS, X(Y) is somewhere between parentheses and multiplication. He wasn't the smartest Mathemagician, but I thought that this made sense.

If you use the distrubutive property, the answer is two. And I don't think properties will disturb the solution, right?

48 / 2(3 + 9)
48 / (6 +18) - You could distribute the 2 here.
48 / 24
2

I think it makes sense. You can't just break the bond between the 2 and the ( ). I've never seen the bond broken like that before. But im not sure, it might be 288. Either way, its a poorly formed equation.

Look at my post above.


But you can implement properties anytime without disturbing the solution, right?

What do you mean?


http://www.purplemath.com/modules/numbprop.htm

There's a greater order than needs to be respected in the case of this equation.

It's because you're not reading the equation correctly.

You're reading it like this 48 / (2(3+9)) as if the denominator is 2(3+9).

But the truth is that it is (48/2)*(3+9).



drkohler on 29 July 2012
Cobretti2 said:

That is a well known bug in cheap calculators (that apparently still exists today). They do not correctly resolve the missing * in 2(3+9) leading to the false result 2.

>48 / 2(3 + 9)
*>48 / (6 +18) - You could distribute the 2 here.
>48 / 24

*This is the fault these calculators make, essentially. Breaking the left to right evaluation with a distribution step.



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Jay520 on 29 July 2012

the equation is broken anyway. I still stand by the 2.

I say the equation has two terms.

Term 1 = 48
Term 2 = 2(9+3).

The equation = Term 1 / Term 2

You can't just take a piece if term two (the 2) without using all of term two. ( the 9+3 )



Boutros on 29 July 2012
Jay520 said:
the equation is broken anyway. I still stand by the 2.

I say the equation has two terms.

Term 1 = 48
Term 2 = 2(9+3).

The equation = Term 1 / Term 2

You can't just take a piece if term two (the 2) without using all of term two. ( the 9+3 )

But 2(9+3) is two terms...



CharmedontheWB on 29 July 2012
Boutros said:
Jay520 said:
I believe the answer is 2. My math teacher once told me that an X(Y) bond is of a higher priority than an X*Y. I believe he said that on the PEMDAS, X(Y) is somewhere between parentheses and multiplication. He wasn't the smartest Mathemagician, but I thought that this made sense.

If you use the distrubutive property, the answer is two. And I don't think properties will disturb the solution, right?

48 / 2(3 + 9)
48 / (6 +18) - You could distribute the 2 here.
48 / 24
2

I think it makes sense. You can't just break the bond between the 2 and the ( ). I've never seen the bond broken like that before. But im not sure, it might be 288. Either way, its a poorly formed equation.

Look at my post above.

If you are going to use the distributive property then you would first have to rectify the division prior to distributing: 

48/2 (3+9)

24(3)+24(9) = 288



Jay520 on 29 July 2012
Boutros said:
Jay520 said:
the equation is broken anyway. I still stand by the 2.

I say the equation has two terms.

Term 1 = 48
Term 2 = 2(9+3).

The equation = Term 1 / Term 2

You can't just take a piece if term two (the 2) without using all of term two. ( the 9+3 )

But 2(9+3) is two terms...



oh yeah....scratch that.

CharmedontheWB on 29 July 2012
Jay520 said:
the equation is broken anyway. I still stand by the 2.

I say the equation has two terms.

Term 1 = 48
Term 2 = 2(9+3).

The equation = Term 1 / Term 2

You can't just take a piece if term two (the 2) without using all of term two. ( the 9+3 )


If the equation were a two term equation it would be written as such:

48/(2(9+3))

The fact of the matter is that it actually is:

(48/2)(9+3)