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05-10-2009, 12:27 AM
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#1 |
  
Drives: yaris Join Date: Oct 2008
Location: amerika
Posts: 258
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ive had it with math...
So im studying for finals today. For math, which i suck at, which is bad because im a bio major. Anyways im workin on this problem from like30 minutes on the review sheet that the professor gave us. Its like algebra 2 so its supposed to be easy...but nor for me
Now i do not like math because sometimes i have problems seeing its practical use. And it makes me very disgruntled when math books try to take the math and put it to some sort of real life situation. Heres the problem. Your boss gives you 1000 dollars to get vodka for an employee party. He wants you to get so many bottles of grey goose (for the VIP guests) which is 36 dollars a bottle, and so many bottles of skyy vodka for 20 a bottle. He wants you to have a total of 37 bottles. So im workin at this beotch for liek 20 minutes (yes i know im retarted at math) and finally i cant find an answer so i get fed up and look to see what the answer is. Here it is. 16.25 bottles of grey goose and 20.75 obttles of skyy. WTF this is not a real life problem you cannot get 16.25 bottles of vodka!!! actually maybe u can get like one of the little bottles to make the .25 But at that point today i was studyin for 3 hours strati in my most hated subject and was really getting fed up and just like flipped out. I know this sounds stupid but golly i hate math >< it was just ugh Woot +1 on post count for this childish rant.
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ballin on a budget. |
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05-10-2009, 12:39 AM
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#2 |
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vroom vroom
Drives: lil red 5-door Join Date: Sep 2006
Location: Bangkok, Thailand
Posts: 7,744
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come on... when you're at the liquor store, open one bottle of grey goose and drink 3 quarters of it, then one quarter of the other brand... problem solved! and better catch a bus back to the office
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The price of freedom of religion, or of speech, or of the press, is that we must put up with a good deal of rubbish. - Robert Jackson  Bye bye 1NZ... |
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05-10-2009, 12:47 AM
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#3 |
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your answer shows 38 bottles unless you mix the part bottles of Vodka and Grey Goose into one bottle
 which means one bottle is for the VIP WorkersOh and there's nothing in the problem that say's you have to spend the whole $1000. ie 1 bottle of Grey goose = $36.00 36 bottles Vodka = $720.00 total = $756.00 Leaves $244.00 for car mod's |
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05-10-2009, 12:53 AM
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#4 |
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Banned
Drives: 2007 4 Door Yaris Join Date: Jan 2009
Location: Southern California
Posts: 1,357
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36x + 20y = 1000 (grey goose at 36 a bottle + sky at 20 a bottle = 1000 dollars)
x + y = 37 or y = 37-x ( grey goose + sky = 37, and then solved for y) 36x + 20(37-x) = 1000 (plug where you solved for y above into the first equation) 36x + 740 - 20x = 1000 (work it out) 16x = 260 x = 16.25 36(16.25) + 20y = 1000 (plug the solved value of x in) 585 + 20y = 1000 20y = 415 y = 20.75 Doing the work is always better than looking at the answers |
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05-10-2009, 01:20 AM
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#5 |
Drives: 2008 Yaris Liftback (Sprocket) Join Date: Oct 2008
Location: San Antonio, Texas!
Posts: 2,799
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Would you rather be doing grad-school level ethics? That is what I am suffering through at the moment, and this is my second masters degree!
But one more class after this one, and a comprehensive exam, and I am done! Cheers! M2 |
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05-10-2009, 01:30 AM
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#6 |
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Captain Slow
Drives: '08 1.5 hatchback Join Date: Dec 2008
Location: Jakarta
Posts: 145
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x=16.25,so count it up ~16
y=20.75,so made it ~21 16+21=37 
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05-10-2009, 01:50 AM
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#7 |
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why do they give you a problem like that. don't they know it'll just make the students go out and drink, instead of doing their homework?
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05-10-2009, 02:08 AM
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#8 | |
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Banned
Drives: 2008 Yaris Join Date: Oct 2008
Location: Pennsylvania
Posts: 1,034
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Quote:
This is a very simple Linear Algebra problem, one in two dimensions.... I'll re-do the previous answer with some greater clarity... Let X equal number of bottles of GG Let Y equal number of bottles of SV You have $1000 to mess with, so the total cost is the number of bottles of each times their price, which ought to equal $1000.00 a) $1000 = $36.00X + $20.00Y Total number of bottles equals 37, or b) X+Y=37 Subtract X from both sides of b... X+Y-X=37-X Y=37-X Substitute into transformed b into a, eliminating dollar signs for simplicity... 1000 = 36(37-X)+20X 1000=36*37-36X+20X = 36*37+(20-36)X 1000=36*37-16X Subtract 16X from both sides and 1000 from both sides... 16X= 36*37-1000 I don't have a calculator nearby, at least a good one, so let's simplify a bit... 4X=9*37-250 X=(9*37-250)/4 = 83/4= 20.75 Y=37-X=37-20.75= 16.25 Add em up to get 37 bottles.... Your prof made an "error" of sorts by using fractional values for bottles... this probably confused the dickens out of a lot of people. If he'd allotted you $4000 the problem makes more sense... X+Y= 156 bottles $4000 =$36.00X + $20.00Y Y=156-X 4000=36X + 20(156-X) 4000=16X+20*156 4000-3120=16X 880=16X X=55 Y=101 Gene |
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05-10-2009, 02:14 AM
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#9 |
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Banned
Drives: 2008 Yaris Join Date: Oct 2008
Location: Pennsylvania
Posts: 1,034
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By the way, a little trick for the future....
Dimensional analysis.... It's really easy.... you have values called dimensions, such as weight, length, and so on. Even nouns can be dimensions. So if you have a price for a bottle of liquor it's not $36.00 but $36.00/bottle. The term "bottle" is in the divisor. To get it out of the divisor you multiply the price times the number of bottles to get a total price... $36.00/bottle times 5 bottle = $36.00/[strike]bottle[/strike] times 5 [strike]bottle[/strike] = $180.00 plus tax. See, we didn't give you the entire story. If you redo the equations PROPERLY it gives you useful clues to make things go better. Really really useful during a crunch situation, like you're taking an exam or a customer is flipping out and you have to get them an answer FAST... Xbottles + Ybottles = 37 bottles total $1000 = $36.00/bottle*Xbottles + $20.00/bottle*Ybottles Note that I've shown all of the dimensions... and that you can use these dimensions as a "check" to see that your equations are valid. This is one of those little "inside tricks" that lets us figure out if we're right or wrong. As one Prof told me years ago, "We all make mistakes, but with experience and education we learn how to detect and recover from those mistakes faster and better. Gene |
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05-10-2009, 01:03 PM
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#10 | |
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Drives: 2008 Yaris Liftback (Sprocket) Join Date: Oct 2008
Location: San Antonio, Texas!
Posts: 2,799
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Quote:
Cheers! M2 |
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05-10-2009, 01:25 PM
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#11 |
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Here is the real secret......
Drink the vodka because there is something in the Kool Aid! Don't drink the kool aid!
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some people are little slinkies. . . . .they are really good for nothing. . . .but they still bring a smile to your face when you push them down a flight of stairs. Come to the DARKSIDE..... We have candy   |
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05-11-2009, 12:24 AM
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#12 |
Drives: 07 Yaris sedan Join Date: Jun 2007
Location: Keremeos BC
Posts: 986
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I empathise, masta; I have yet to master mathematics, and I'm 70! Turns out, math is highly over rated, and I had a varied and interesting career simply by using the TLAR method of calculating...
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05-11-2009, 02:31 AM
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#13 |
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Joey
Drives: '14 Scion xD 5-speed Join Date: Oct 2008
Location: El Monte, Ca
Posts: 3,529
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Tell the boss to get his own damn liquor. It's not your party, why should you have to do it?
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Formerly owned Met-Met. '07 Yaris LB 5-speed. A forum post should be like a skirt: Long enough to cover the subject but short enough to keep things interesting. "I don't have an anger problem. I have an idiot problem." -Hank Hill |
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05-11-2009, 02:44 AM
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#14 |
Drives: 2011 Toyota Camry Hybrid Join Date: Oct 2008
Location: Victoria, Australia
Posts: 6,412
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1+1=Maths
Maths < Interesting so therefore i hate maths
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  "Manual labour is not for me. In fact i'm not even sure non manual work is either." -Anthony Linton Check out ▬▬► I like I like ◄▬▬ for more fun on Facebook |
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05-11-2009, 12:42 PM
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#15 |
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Drives: 07 Yaris sedan Join Date: Jun 2007
Location: Keremeos BC
Posts: 986
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Max is right about learning from others' mistakes.
My best successes were when I thought out and instituted a solution to a problem and some engineer did the math to prove that the solution worked after the fact... |
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05-11-2009, 12:45 PM
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#16 | |
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Drives: yaris Join Date: Oct 2008
Location: amerika
Posts: 258
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Quote:
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ballin on a budget. |
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05-11-2009, 11:00 PM
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#17 |
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Drives: 07 Yaris sedan Join Date: Jun 2007
Location: Keremeos BC
Posts: 986
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That Looks About Right...
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05-12-2009, 08:54 AM
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#18 | |
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Quote:
Sophisticated Wild Ass Guess 
__________________
some people are little slinkies. . . . .they are really good for nothing. . . .but they still bring a smile to your face when you push them down a flight of stairs. Come to the DARKSIDE..... We have candy |
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