PDA

View Full Version : The Annoying Math Game



tony_montana
Feb 28, 2006, 09:38 PM
I don't know why Im making this game up. Im just bored and this will give us something to do!:D Plus I think we could use another game.
Anyway, the game is simple. Im gonna put a math problem here(annoying algebra type math:D ) and see who can answer it. Whoever answers it gets to make up the next problem. Simple, eh?

Here it goes!
2(x+2)=?
And that's the ANNOYING MATH PROBLEM!:D

reese35
Feb 28, 2006, 10:21 PM
Question: Are we supposed to figure out the answer, the variable, or both? ;)

tony_montana
Feb 28, 2006, 11:00 PM
you figure out both of them. come on, don't tell me you guys cant do this problem!;)

2(x+2)=?

NeCoHo
Mar 1, 2006, 05:05 AM
Must we show our work? :D

2(x+2)
2x+4
2x=-4
x= -2

2(-2+2)
2(0)
0

han_keep_smilin
Mar 1, 2006, 12:45 PM
I am really bad at maths so i wont even start to try this!!!!!!!!:D

yardgames
Mar 1, 2006, 01:21 PM
Here's a much harder one. Tell me the vertex of the graph of the following equation: y = -5x^2 + 20x -3 (note: that's 5 x squared)

samboo1
Mar 1, 2006, 04:03 PM
Wow, i didnt understand any of that! Ill wait to try someone elses ;)

yardgames
Mar 1, 2006, 05:09 PM
HAH! I am the MATHMASTER!! :) No one can solve my problem.

Dabney
Mar 1, 2006, 05:18 PM
@yardgames: May the vertex be (-2/-63)? I didn't try too hard, so probably it's wrong...


and @J.: For your solution x=-2 the equation would have to be 2(x+2)=0, but Mike's one was only 2(x+2)=?, so I would have stopped calculating with 2x+4.

Does that make any sense or am I talking total crap?

NeCoHo
Mar 1, 2006, 05:23 PM
It was asked to do both, as in both finding the variable, and solving it, unless I misinterpreted it...

admin
Mar 1, 2006, 05:31 PM
I haven't done maths for years now, but I always thought you needed simultaneous equations to calculate 2 independant variables. Currently that equation is possible with an infinite amount of numbers because ? will always be equal to 2x + 4. Therefore you can't have a wrong answer.

yardgames
Mar 1, 2006, 06:34 PM
@Dabney: No, that's not correct. Sorry.

If it helps, you don't actually have to graph it. It's much more precise to solve the equation. Which of course you can't do because you have an x squared and an x, which aren't like terms and cannot be combined. So you need to convert the equation to something usable. I recommend using a perfect square trinomial.

tony_montana
Mar 1, 2006, 06:37 PM
Ok, who solved the problem first? Yardgames, J, or someone else?(id like to do a turn based thing. whoever solves gets to make the next problem and they can make it extremely easy or extremely hard!:D )

tony_montana
Mar 1, 2006, 06:39 PM
Whoops, just saw it! J solved it first so therefore it is now his turn to make any problem he wants!

Wildcat
Mar 1, 2006, 07:37 PM
y = -5x^2 + 20x -3

Basic quadradic equation: y = ax^2 + bx + c

Formula for the axis of symmetry: x = -b / 2a

Solving for x:

x = -20 / 2(-5)
x = -20 / -10
x = 2

Solving for y:

y = -5 (2)^2 + 20 (2) -3
-5 (4) + 40 -3
-20 + 40 - 3
y =17

Vertex = (2, 17)

yardgames
Mar 1, 2006, 07:57 PM
Yep, that's right. Damn, I should have asked you when I was trying to figure out how the hell to do this stuff-that's a lot easier than the way my teacher taught me. :D Of coures, after he taught us, he gave us a calcuator program that does it automatically--it's great, just type in the numbers and it finds x-intercept, y-intercept, vertex, and a bunch of other crap for you.

samboo1
Mar 2, 2006, 02:45 AM
Wow. What's ^ mean??:o :confused:

simon_4420
Mar 2, 2006, 04:18 AM
Wow. What's ^ mean??:o :confused:

They are using it to represent a squared number, for example 3² :)

Wildcat
Mar 2, 2006, 06:51 AM
Yep, that's right. Damn, I should have asked you when I was trying to figure out how the hell to do this stuff-that's a lot easier than the way my teacher taught me. :D Of coures, after he taught us, he gave us a calcuator program that does it automatically--it's great, just type in the numbers and it finds x-intercept, y-intercept, vertex, and a bunch of other crap for you.

Yeah, I was wondering why you suggested taking the perfect square trinomial. I guess you could do it that way, but it seems like it would be a lot harder and more and more involved. I hate it when they make you do all that work then tell you that you could just plug it into the calculator. They just do it to torture us. :D

I'll let someone else post the next one cause I got rid of my algebra book and I can't think of anything off the top of my head.

Dabney
Mar 2, 2006, 10:52 AM
y = -5 (2)^2 + 20 (2) -3
-5 (4) + 40 -3
-20 + 40 - 3
y =17


I'm so stupid, I had my mistake there because i mixed up the + and - :p

NeCoHo
Mar 4, 2006, 09:20 PM
Alright, sorry everyone:

(|-5|+8)(2^5)+33=x
find x

tony_montana
Mar 5, 2006, 12:52 AM
Alright, sorry everyone:

(|-5|+8)(2^5)+33=x
find x

I don't know if we have to show our work!:D Well, I did that on a sheet of paper and here is the answer I got: 865=x Is that right?

NeCoHo
Mar 5, 2006, 06:53 AM
Yep, your turn.

tony_montana
Mar 5, 2006, 11:05 AM
oh yeah! Alright, here's the new problem!

5(5)+5X=25+12X

Simple enough, eh?:D

Wildcat
Mar 5, 2006, 12:28 PM
5(5)+5X=25+12X

25 + 5x = 25 + 12x
- 5x = - 5x

25 = 25 + 7x
-25 -25

0 = 7x
x = 0

If this is right, I have a good one for you all. :D

tony_montana
Mar 5, 2006, 02:58 PM
Great work, wildcat! You got it! Your turn! :D

Wildcat
Mar 5, 2006, 04:47 PM
Okay, here's one with a MITM twist. You may need to find a formula somewhere to figure this one out. ;)

Dewey was mad at Malcolm and Reese for not letting him watch his favorite TV show. He decided to get back at them by destroying their comic book collections. Afterwards, he started thinking of what they were going to do to him so he got scared and ran from the house at a rate of 0.08 miles per minute. Wondering what was going on, Malcolm and Reese went to their bedroom and saw their comics shredded all over the floor. Furious, they began to run after him at a rate of 0.12 miles per minute. Dewey had a two minute head start. How long will it take for Malcolm and Reese to catch up to Dewey so they can beat the snot out of him?

*Just FYI: 0.08 miles per minute is approximately 5 mph and 0.12 miles per minute is approximately 7 mph. I went ahead and converted them to miles per minute, rather than miles per hour to save you the trouble. :D

tony_montana
Mar 6, 2006, 08:34 PM
Uh...jeez...uh.....oh, is it 4 minutes?

Wildcat
Mar 7, 2006, 12:14 AM
That's right! Great job. That was a hard one. :D If anybody was wondering how to get it, you have to use the formula: Distance = rate * time

You're trying to figure out at what time will Malcolm's and Reese's distance be equal to that of Dewey's so you set Distance 1 (Dewey) = Distance 2 (Malcolm/Reese). You have to take into account that dewey had a 2 minute head start so you would set his time ahead 2 minutes (t + 2), then you just plug in the numbers:

D = rt
D1=D2
0.08 * (t+2) = t * 0.12

Which can be simplifeid to:

2 * 0.08 = t * (0.12 - 0.08)
0.16 = 0.04 t
0.16 / 0.04 = 0.04 / 0.04 t
t = 4 minutes

Is that how you got it, Tony?

tony_montana
Mar 7, 2006, 09:01 PM
That's right! Great job. That was a hard one. :D If anybody was wondering how to get it, you have to use the formula: Distance = rate * time

You're trying to figure out at what time will Malcolm's and Reese's distance be equal to that of Dewey's so you set Distance 1 (Dewey) = Distance 2 (Malcolm/Reese). You have to take into account that dewey had a 2 minute head start so you would set his time ahead 2 minutes (t + 2), then you just plug in the numbers:

D = rt
D1=D2
0.08 * (t+2) = t * 0.12

Which can be simplifeid to:

2 * 0.08 = t * (0.12 - 0.08)
0.16 = 0.04 t
0.16 / 0.04 = 0.04 / 0.04 t
t = 4 minutes

Is that how you got it, Tony?

Actually, I didn't use any formula at all!:D I got a sheet of paper and used the given numbers and put them into fractions, such as Dewey was 1/4 a mile ahead and Reese/Malcolm trailed him at 2/4 miles. Thus, I figured it'd take about 4 minutes for them to catch Dewey. Im amazed I got it!:D Anyway, I guess it's my turn. If you don't mind, Im going to use a word problem too, to give mine a MITM twist!(not trying to steal your idea:D ).

Hal and Lois bought a brand new car. Before going to work, Lois tells Hal not to drive the car. Later in the day, Hal gets in the car. He drives 10 minutes from the house. Hal then realizes Lois gets off early and turns around to speed home at 65 MPH. Lois is driving home at 50 MPH and is only 5 minutes away. Hal must get to the house with the car before Lois. How fast must he go to get home before Lois?

Good one, eh?:D

NeCoHo
Mar 8, 2006, 05:02 AM
Wouldn't he have to go more then 100MPH? I just did this mentally, so I think I'm wrong...

MalcolmReeseDewey
Mar 8, 2006, 03:11 PM
OK i guess you guys are clever!! Something that i am not good at is maths!!

tony_montana
Mar 8, 2006, 08:15 PM
Wouldn't he have to go more then 100MPH? I just did this mentally, so I think I'm wrong...

Come on, think of a actual number!:D You are very close!

NeCoHo
Mar 9, 2006, 04:58 AM
uuhh... 101mph?

tony_montana
Mar 10, 2006, 02:42 PM
Ever so close!

NeCoHo
Mar 10, 2006, 03:40 PM
how about 105 mph?

tony_montana
Mar 10, 2006, 04:18 PM
how about 105 mph?

Once again, J nabs the answer!:D Your turn!

Lucky Maroon
Dec 21, 2007, 05:21 PM
Okay, here's one with a MITM twist. You may need to find a formula somewhere to figure this one out. ;)

Dewey was mad at Malcolm and Reese for not letting him watch his favorite TV show. He decided to get back at them by destroying their comic book collections. Afterwards, he started thinking of what they were going to do to him so he got scared and ran from the house at a rate of 0.08 miles per minute. Wondering what was going on, Malcolm and Reese went to their bedroom and saw their comics shredded all over the floor. Furious, they began to run after him at a rate of 0.12 miles per minute. Dewey had a two minute head start. How long will it take for Malcolm and Reese to catch up to Dewey so they can beat the snot out of him?

*Just FYI: 0.08 miles per minute is approximately 5 mph and 0.12 miles per minute is approximately 7 mph. I went ahead and converted them to miles per minute, rather than miles per hour to save you the trouble. :D

Weird... I've actually learned about d=rt. I wouldn't have gotten a word-- excuse me, number-- of this thread (after the first problem) a few months ago. Guess I'm learning something in school. :P

EDIT: Is the math annoying, the game annoying, or both? xD (referring to title)

yardgames
Dec 22, 2007, 11:45 PM
d=rt is an extremely handy formula. I frequently use it during long car trips to approximate how much longer the trip will take me.

Lucky Maroon
Dec 22, 2007, 11:48 PM
Cool. See, I'm not one to use math in accordance with logic. That's not really a good thing on my part.

PatrickGaffey
Jan 31, 2013, 02:02 PM
the mathematical answer is w, which is an algebraic number meaning ''who cares?''

EzPz
Feb 10, 2013, 10:50 AM
the mathematical answer is w, which is an algebraic number meaning ''who cares?''
I'm guessing you don't like Maths...

As tony_montana said, the answer is 4 minutes ;)
Although I didn't see the answer until after I did it myself. I missed page 3 for some reason and only saw Lucky Maroon's post on page 4.

My working:

time= distance/speed

For Dewey:
t+2=x/0.08
(where t= time to catch up and x= distance they ran)
0.08t+0.16=x

For Malcolm and Reese:
t=x/0.12
0.12t=x

So:
0.12t=0.08t+0.16
0.04t=0.16
t=0.16/0.04=4 minutes :D

(Which means incidentally they ran 0.12*4=0.48 miles
which is around 772.5 metres)