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(2R cubed - 8)/9 = 120/9

so, what does R =?

Still having trouble with Enigma?

 

Throw out the nines, since they're in the denominator on both sides.

 

Add eight to both sides to get 2R^3=128

 

Divide by 2 to get R^3=64

 

Take the cube root of both sides to get R=4.

 

Good luck with the puzzle!

 

You're really going to hate ?

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(2R cubed - 8)/9 = 120/9

so, what does R =?

If I understand the question:

 

((2R)^3-8)/9=120/9

(2R)^3-8=120

(2R)^3=128

2R=5.0396841995794926590688424291129

R=2.5198420997897463295344212145565

 

or is it

 

(2(R^3)-8)/9=120/9

2(R^3)-8=120

2(R^3)=128

R^3=64

R=4

 

I didn't know if you are cubing 2R or just R.

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You're really going to hate ?

 

What the... The only thing i gathered from that is the ? picture is in .png format. Beyond that, I've got no clue.

Perhaps there is something more at the listed coordinates.

Yeah I was afraid that was the case... 2500 miles is a long way to go to find out <_<

Especially if it requires a "quick" trip back home to dig out a calculator and the old high school trig/algebra/calculus textbook.

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(2R cubed - 8)/9 = 120/9

so, what does R =?

If I understand the question:

 

((2R)^3-8)/9=120/9

(2R)^3-8=120

(2R)^3=128

2R=5.0396841995794926590688424291129

R=2.5198420997897463295344212145565

 

or is it

 

(2(R^3)-8)/9=120/9

2(R^3)-8=120

2(R^3)=128

R^3=64

R=4

 

I didn't know if you are cubing 2R or just R.

Common usage among mathemeticians says that 2R cubed mean Rcubed multiplied by 2. Exponents are computed before multiplication.

 

Just an old math teacher chiming in.

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(2R cubed - 8)/9 = 120/9

so, what does R =?

If I understand the question:

 

((2R)^3-8)/9=120/9

(2R)^3-8=120

(2R)^3=128

2R=5.0396841995794926590688424291129

R=2.5198420997897463295344212145565

 

or is it

 

(2(R^3)-8)/9=120/9

2(R^3)-8=120

2(R^3)=128

R^3=64

R=4

 

I didn't know if you are cubing 2R or just R.

Common usage among mathemeticians says that 2R cubed mean Rcubed multiplied by 2. Exponents are computed before multiplication.

 

Just an old math teacher chiming in.

Ditto. It's called order of operations. Exponents first, then multiply or divide, last add or subtract.

Link to comment
(2R cubed - 8)/9 = 120/9

so, what does R =?

If I understand the question:

 

((2R)^3-8)/9=120/9

(2R)^3-8=120

(2R)^3=128

2R=5.0396841995794926590688424291129

R=2.5198420997897463295344212145565

 

or is it

 

(2(R^3)-8)/9=120/9

2(R^3)-8=120

2(R^3)=128

R^3=64

R=4

 

I didn't know if you are cubing 2R or just R.

Common usage among mathemeticians says that 2R cubed mean Rcubed multiplied by 2. Exponents are computed before multiplication.

 

Just an old math teacher chiming in.

Ditto. It's called order of operations. Exponents first, then multiply or divide, last add or subtract.

I understand order of operations (I use to be a math minor and tutor). I wasn’t sure because of the way it was written in the question. To me at first it looked like 2R was to be squared not just R. This is why I have both of my interpretations of the problem. I realize it would have made more sense in a textbook. :mad:

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Keep it up Cheese, and you just may have me on a road trip north.

Between Enigma and ? you should all come on up to Wisconsin and test your wits!!

 

:ph34r:

Wow... the Folks posting in the forums! Welcome! ? Is the cache that I mentioned that I was going to call the Cheesehead Enigma until yours popped up. That's OK, as I like the new name better.

 

I just need to figure out how to pronounce it...

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