TSGK Clan Forum

Phat Bacon

can anyone solve this?

solve for Z: [(13z)24]/45=(34z)-222+45
/ means divided by
i hope i can get this!! Laughing

just wanted to see if anyone knows...i sucked at this part in math class this year. but hey...i'm in advanced history, gotta be good at something!!

Xmeagol · Posted: Fri Mar 23, 2007 21:36 Post subject:

i hate equations

Ma[X]u'][' · Joined: 04 Sep 2006 Posts: 245 Country: Browser:

solve for Z: [(13z)24]/45=(34z)-222+45

[312z]/45 = -7548z+45

312z+7548z = 45*45

7896z = 2025

z= 2025/7896

z = 0.256 [to 3 decimal places]

Xmeagol · Posted: Fri Mar 23, 2007 23:44 Post subject:

krazimu

deluxe · Posted: Sat Mar 24, 2007 00:42 Post subject:

Diet H2O_TSGK · Posted: Sat Mar 24, 2007 02:48 Post subject:

ok - here's the deductive way:
solve for Z: [(13z)24]/45=(34z)-222+45

[312z] / 45 = 34z – 222 + 45

[312z] = 45(34z – 222 + 45)

312z = 1530z – 9990 + 2025

312z = 1530z –7965

312z - 1530z = -7965

- 1218z = -7965

z = -7965 / -1218

z = 6.5394

and here's the way using Microsoft Excel Solver:

Cell D5 will represent the variable Z - let's call this cell Z. We just leave this blank
Cell E5 will represent the answer or correct value for Z - let's call this cell answer. We put in the formula =D5
We have 2 sides of equation. In cell D7 let's put in left side using cell reference D5 or 'Z' into the formula ((13z)24)/45. This is done by typing in =((13*Z)*24)/45
Similarly Cell D8 is the right side, 34z -222+45, typed in as =(34*Z) -222+45

Now we click tools, solve (or tools , addin click solver) and we get the following screen. Essentially we tell sover to solve the 'answer' (cell E5), by changing Z (D5) in such a way to ensure that the equation is true ie that D7 = D8. Click solve and you're sorted.

deluxe · Posted: Sat Mar 24, 2007 11:17 Post subject:

Xmeagol · Posted: Sat Mar 24, 2007 12:13 Post subject:

i dont like math at all, ill stick with physics, much easier

Habitathxc

Xmeagol · Posted: Sat Mar 24, 2007 14:07 Post subject:

ill stick with quantum physics Very Happy

im trying to leanr that, but im learning atomic physics first

SAMWIDGE

holy shit! thats one big sum

Xmeagol · Posted: Sat Mar 24, 2007 19:39 Post subject:

max is a book addict Razz

what did you espect Laughing

SAMWIDGE

theres nothing wrong with being smart Smile

Xmeagol · Posted: Sun Mar 25, 2007 15:14 Post subject:

no i mean his parents are those typical idiots

the guy has grades up to 80, and his parents say it sucks

im lucky to get a 60 in math

Shimmy_TSGK · Posted: Sun Mar 25, 2007 15:17 Post subject:

lol I am glad i finished highschool. no more math. it was a horror Sad

pure horror Very Happy

so happy those days are over Very Happy

deluxe · Posted: Sun Mar 25, 2007 15:43 Post subject:

Diet H2O_TSGK · Posted: Sun Mar 25, 2007 16:07 Post subject:

SAMWIDGE

oh well good try, i wouldnt have a clue where to start. Very Happy

Phat Bacon · Posted: Sun Mar 25, 2007 19:03 Post subject:

i think i put up a problem i can't even solve myself Laughing

. one question though.....where would we use this type of equation in the real world? i mean would a burger flipper at McDonald's need to know this? i think it is all stupid. anyway to start off the equation i think you need to "combine like terms" the two Z's need to be either added or 34z-13z which would equal 21z. i'll get the study guide from school and post all the steps on monday. i'll also get my teacher to attempt to solve it Razz

deluxe · Posted: Sun Mar 25, 2007 19:52 Post subject:

Phat Bacon · Posted: Sun Mar 25, 2007 20:13 Post subject:

deluxe · Posted: Sun Mar 25, 2007 20:28 Post subject:

hm in chemistry u also have to deal with cubic equations,
but in history u probably wont find a lot of maths Laughing

Diet H2O_TSGK · Posted: Sun Mar 25, 2007 20:43 Post subject:

Phat - you are so wrong about such equations... they are used everywhere and I mean everywhere.

Linear programing was invented for military purposes to solve logistical problems. It has grown and grown. It's the basis for so many things, the interest rate a bank will charge to an applicant, throughput on production lines, maximisation of assets. The list is really endless.

A practical example:

A department store requires different numbers of full-time employees on different days of week. The number of full-time employees who must work on each day is as follows:

Monday 17
Tuesday 13
Wednesday15
Thursday 19
Friday 14
Saturday 16
Sunday 11

Union rules state that each employee must work five consecutive days and then have two days off. The department store wants to meet its daily requirement using only full-time employees.

What's the minimum number of full-time employees that must be hired.

This isn't the easiest of problems, but it happens all the time. The answer is 23.

SAMWIDGE

you got told Very Happy

.....

deluxe · Posted: Sun Mar 25, 2007 21:37 Post subject:

..right diet.

the list is endless, another example: every technique used to encode things such as: ur emails, the credit card data u send to a server if u buy something online...
it is just pure maths,
and maths without equations - is not really maths-

last example:there are thousands of equations used in hl2:dm to get the game running, without them ur game wouldnt work.
so are these equations really useless?? Smile

Phat Bacon · Posted: Mon Mar 26, 2007 01:00 Post subject:

OK...all i'm saying is math is a hard subject and I(notice the word "I") find no use for such. but that's just me!!! just go be the president of the US or something!! my god if u know everything i'll vote for ur second term!! in fact anyone can be the next pres...bush is a fool. (not because he doesn't know math....yeah i read ur comeback before u thought of it so HA!)

CHEERS!! Razz

Freelancer · Posted: Mon Mar 26, 2007 08:41 Post subject:

Omg Equasions!
NOOO! THe HORROR !! It came to the pc already!!!! NOOOOOOOOO!!!!!! Shocked

Plasmo_TSGK · Posted: Mon Mar 26, 2007 09:01 Post subject:

Math is a wonderful thing. I'm not as good at it as I once was, but I always love farting around with numbers. But yeah, once you get into chemistry fun things start to happen mathematically Rolling Eyes

. I just hope I never have to do systematic treatment at equilibrium for a triprotic acid or base ever again. It ain't that hard but boy golly is it tedious (a good 40 minutes for a problem when you actually know what's going on)...especially when you forget that the system you are dealing with is buffered Embarassed

...

suckface · TSGK Member Joined: 08 Feb 2007 Posts: 30 Country: Age: 38

You really can't avoid math no matter what field you go into. If you go into History, you won't need to learn all that much math, but you will need to learn how to analyze data, and that is math.

I hated Math when I was first in Highschool, but believe me, you want to learn this basic stuff well, or you will have a lot of unnecessary hard times when you find yourself needing to use it.

Don't worry, though: you will not need to subject yourself to the tedium of solving equations like that by hand as soon as you get into a higher math class. You'll get a graphing calculator that will be able to solve all the equations you can throw at it.

And Breen, I'm sorry to break it to you, but Quantum physics involves some of the most involved math that has been developed to date.
I'm learning some basic quantum right now, and in order to start learning it at all you need to understand Newtonian Mechanics and E&M stuff, and have a working knowledge of Calculus and statistics.
Sure, you can pick up some trivia about quantum physics by reading magazines or whatever, but if you actually want to know any of it, you need the math and classical physics.