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# The Inverse Math Game!

20 replies to this topic

### #1 yano

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Posted 28 April 2005 - 07:11 PM

Since everything in math has an opposite. I decided there should be an opposite game to the other one I made.

So in this game you provided a equation with a varible and the next person has to solve it. and provide a new equation to be solved. Let's keep the variable simple and not something like X cause that is an mutliplication here since we can't really show multioplication with just a dot...

Example:

yanowhiz: (7z)-8 = 41

Person 1: z=7

equation: (25q+5) / 8 = 100

Person 2: q = -1.3166...

[(15n) + 9] / 3 = 500

Person 3: n = 99.4

(equation...)

So basically this can go on for ever (infinte), hehe

So here I'll start it off with something simple

2p=100

hehe

Good luck, and God speed!

Edited by yanowhiz, 28 April 2005 - 07:12 PM.

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Posted 01 May 2005 - 07:52 AM

p=100/2
p=50

### #3 yano

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Posted 02 May 2005 - 02:31 PM

ok you solved mine, however u forgot to provide a new equation....

### #4 lulabelle

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Posted 02 May 2005 - 03:06 PM

6y=(55/y) +61

### #5 yano

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Posted 03 May 2005 - 09:20 AM

y = -.833...

that was a tricky one I had to get out my TI-83 to work that one, lol. Anywho... next...

(9/4)x = (5x/10) + 35

Good luck.

### #6 henryx

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Posted 05 May 2005 - 03:33 PM

x= 35 / [(9/4) - (1/2)]
x = 20

(5/2)k + (3/4)k = (13/4)k

### #7 yano

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Posted 05 May 2005 - 06:11 PM

Correct.

k = -0.25

New equation...

Pulling out the big guns here...

( 7! * Q ) + 3 = 60.615697068490954% of 37,421

Good Luck!

### #8 henryx

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Posted 05 May 2005 - 07:21 PM

k = -0.25 is correct and can be also k = 2

Q = 4.5

log 10 = (123/789)*P

Edited by henryx, 05 May 2005 - 07:22 PM.

### #9 yano

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Posted 06 May 2005 - 09:29 AM

6.414634147 = P

I've never really used the "log" function before, however my ti-83 has the button and used it.
I'm currently on in Geometry, but I know more than Geometry however. Its the only class I'm getting straight A's in...

New equation...

ln(2005) * V² = 1710.764852 / V

Edited by yanowhiz, 06 May 2005 - 09:30 AM.

### #10 henryx

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Posted 06 May 2005 - 03:12 PM

And you are correct... hey what is ti-83?

V = 6.08

Next...

M(sin 30) = [(0.5)N] / (cos 60)
Note: M = 2N
Find M?

Edited by henryx, 06 May 2005 - 03:16 PM.

### #11 yano

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Posted 06 May 2005 - 09:34 PM

Um... I messed up that equation it was suppose to be different. (V = 15) and that each side equaled 1710.764852. Anywho... your answer is correct for that problem (off by a few decimal places). However still close.

Your equation... tricky... hehe

um...

-N = .5 or N = -.5 ?

Next equation...

X^3 = (T * 2) + (tan45)

T = ( pi * e)²

Please do not post any homework problems here! This spoils the fun in creating and manipulating problems. Thank you.

### #12 henryx

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Posted 07 May 2005 - 09:35 AM

-N = .5 or N = -.5 ?

Next equation...

X^3 = (T * 2) + (tan45)

T = ( pi * e)²

N = +0.5 will look better, anyway it's still correct

X = 4.19695661221

5F - 2 = log(base 2)2

Edited by henryx, 07 May 2005 - 09:37 AM.

### #13 yano

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Posted 07 May 2005 - 09:20 PM

Ok I had to as my girlfriend for help on this... (I'm only in Geomtery and she is in Trig/Calc, and yet we are in the same grade level; however different schools obsiovsly...)

Anywho, we (um... she) says the answer is F = 3/5 -or- .6

Next problem.
hehe i'm kinda bending the rules here, but I thought it would be worth a try...

Find the Surface Area of this Regular Octogonal Prism.

Thanks to ImageShack for Free Image Hosting

Edited by yanowhiz, 07 May 2005 - 09:21 PM.

### #14 henryx

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Posted 08 May 2005 - 04:07 PM

3/5 are correct

TSA = 7,016.89792593 sq. in.

yanowhiz = hehe i'm kinda bending the rules here, but I thought it would be worth a try... smile.gif

Lets do some probability, anyway its simple...

There is a 30% chance of rain today. If it does not rain today, there is a 20% chance of rain tomorrow. If it rains today, there is a 50% chance of rain tomorrow. What is the probaability that it rains tomorrow?

### #15 yano

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Posted 09 May 2005 - 04:37 PM

Nope... The correct answer is 5382.067048

Lemme show you the work real quickly

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See?

Now my answer for your problem is 29%. This time I had to ask a tutor on-line somewhere, and this problem even confused him... because they are statistically dependent or something but here is our work for that...

(.3 * (.7)) + (.5 * (.3)) = 29%
I hope that is right...

My equation for you... (muhahaha!)

If you have 10 books on a shelf how many different possibilities can you arrange them?

btw: What is the highest math you've completed?

Edited by yanowhiz, 09 May 2005 - 08:26 PM.

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