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01-25-2009, 03:33 PM | #1 |
NO FATS
Location: NO FEMS
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I need math help
Set C consists of all of the positive integer multiples of 5 that are less than 20. Set D consists of all of the factors of 20. Which of the following is C |_| D?
(Where that |_| is like a wide lower case "u," a symbol I've never encountered before). {1,2,4,5,10,15,20} {2,4,5,10,15} {5,10} {5,10,15,20} {2,4,5,10} |
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01-25-2009, 03:36 PM | #2 |
Posts: 20,282
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The U means union, so it's the all of the numbers from C combined with all of the numbers in D.
So the answer is {1,2,4,5,10,15,20} |
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01-25-2009, 03:38 PM | #3 |
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Thanks. I'll probably have more in a little bit.
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01-25-2009, 03:39 PM | #4 |
Posts: 20,282
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01-25-2009, 03:50 PM | #5 |
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Ok maybe I'm not understanding something here and this is really obvious, but
If 299 is divisible by 2B, and B represents a positive digit, what is the value of B? 2 3 4 6 9 |
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01-25-2009, 04:03 PM | #6 |
yer mom
Posts: 23,180
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I really hope it's that I haven't finished this coffee that's making that confusing to me.
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01-25-2009, 04:06 PM | #7 |
Posts: 20,282
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Assuming 2B means twenty-B and not 2xB, it has to be 3 or 9 because an odd number can't have an even factor. 299/23 is 13, so B is 3.
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01-25-2009, 04:08 PM | #8 |
yer mom
Posts: 23,180
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oohh bad notation ftw
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01-25-2009, 04:08 PM | #9 |
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I'm with you except since when does 2B mean twenty-B
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01-25-2009, 04:09 PM | #10 |
Braindead
Location: i like traffic lights, but only when they're green.
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aha, i was pretty confused by that problem before as well. good thinking, andyslash
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01-25-2009, 04:09 PM | #11 |
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01-25-2009, 04:09 PM | #12 |
yer mom
Posts: 23,180
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01-25-2009, 04:11 PM | #13 |
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Oh ok. I don't feel so bad now.
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01-25-2009, 06:23 PM | #14 |
Just Hook it to My Veins!
Location: František! How's the foot of your turtle?
Posts: 32,741
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sue them!
2B for god's sake jesus fucking christ how on earth could that mean twenty-something?!? REVOLUTION!!! |
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01-25-2009, 06:26 PM | #15 |
Banned
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01-25-2009, 11:50 PM | #16 |
let's see your penis!
Location: i had a few beers, but i'm cool to drive
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i need meth help
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01-26-2009, 12:04 AM | #17 |
Apocalyptic Poster
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01-27-2009, 07:43 PM | #18 |
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If the domain of f is given by x={9,0,-9}, what is the range of the function f(x)=x2+9x
This is probably pretty easy but I don't really remember the gist of the domain/function thing. |
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01-27-2009, 07:45 PM | #19 |
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Oh wait does it just mean I should plug in 9,0,-9 into the function, hence {0,162} ?
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01-27-2009, 07:47 PM | #20 |
Braindead
Posts: 15,482
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i feel like this knowledge was rolling around in my brain at some point.
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01-27-2009, 07:49 PM | #21 |
Minion of Satan
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01-27-2009, 08:46 PM | #22 |
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if 2(the cube root of x) = 3
then x = why is this not completely obvious |
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01-27-2009, 10:44 PM | #23 |
Minion of Satan
Location: the institute
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it sounds like you're trying to do the problems without having seen the theory...
or is this unrelated to a math class? |
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01-27-2009, 10:53 PM | #24 |
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I've seen the theory, it was just 8 years ago.
And yeah, I'm not taking a class. |
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01-27-2009, 10:54 PM | #25 |
Apocalyptic Poster
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01-27-2009, 11:21 PM | #26 |
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Durr. Thanks. Over thinking there a bit. 6th grade ravenguy would pwn 25 year old ravenguy.
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01-27-2009, 11:30 PM | #27 |
Banned
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ravenguy i think my favorite moment of 3rd rock from the sun occurs at 3:55-4:10 of this video YouTube - 3rd RFTS S01 E04- Dick is From Mars, Sally is From Venus (1/3)
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