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• Today, 05:46 PM
Get rid of the 3 "4"s (divide each side by 4): .5^4 * .6^3 + .5^4 * .6^3 * .4 = .3^3 * .7 Let u = .5^4 * .6^3: u + .4u = .3^3 * .7 Play with...
3 replies | 74 view(s)
• Today, 05:16 PM
....or 180(n-3)/n
11 replies | 99 view(s)
• Today, 11:22 AM
Cool puzzle Jomo; cool solution DrP ! Proof(?): FOR a=1 TO 21 FOR b=a+2 TO 22 FOR c=b+2 TO 23 FOR d=c+2 TO 24 FOR e=d+2 TO 25 FOR f=e+2 TO...
3 replies | 87 view(s)
• Yesterday, 05:35 PM
Soooo....what is size of each of the interior angles?
8 replies | 130 view(s)
• Yesterday, 01:43 PM
Also means that x >= 3y (but that's not much help!)
2 replies | 235 view(s)
• Yesterday, 12:30 PM
108? A regular hexagon has 6 angles of 120 each... ge·stalt noun: an organized whole that is perceived as more than the sum of its parts. ...
8 replies | 130 view(s)
• Yesterday, 12:14 PM
Denis replied to a thread Calculating Averages in Arithmetic
Both produce SAME results: ~322.68 (whatever that represents!) Like j-astron, I simply can't tell what you're trying to do.
4 replies | 101 view(s)
• Yesterday, 09:54 AM
You are guessing again...you were told to please STOP guessing... Your calculation of height TA is incorrect: should be sqrt(45^2 - 27^2)
6 replies | 124 view(s)
• Yesterday, 09:35 AM
You have: x/(x+3) + (9x+18)/(x(x+3)) Notice that (x+3) appears twice. The "writing down" of stuff to simplify above can be greatly reduced by: let...
4 replies | 171 view(s)
• 05-23-2018, 07:33 PM
A true friend steps in when the rest of the world steps out... A friend is a friend in spite of, not because of...
10 replies | 214 view(s)
• 05-23-2018, 07:16 PM
We're ALL as advanced as we were when we stopped!! PLUS we're all here because we're not all there :rolleyes:
10 replies | 214 view(s)
• 05-23-2018, 07:10 PM
You possibly could be a "she"; never told us :rolleyes:
11 replies | 237 view(s)
• 05-23-2018, 04:10 PM
Halls has no friends!!
10 replies | 214 view(s)
• 05-23-2018, 03:31 PM
We don't even know if "he" is correct!
11 replies | 237 view(s)
• 05-23-2018, 01:19 PM
Hey "happiness", you never told us: are you a student attending math classes?
11 replies | 237 view(s)
• 05-23-2018, 12:34 PM
Actually, what I meant (without doing any thinking!) is that in any family, there would be no sisters and possibly n brothers if the female was the...
15 replies | 267 view(s)
• 05-23-2018, 12:15 PM
If say 43.3 is changed to 43.2, then we have total of 100% EXACTLY, so 1000 students is minimum. Is that what you're saying DrP? Well, I'm not...
4 replies | 116 view(s)
• 05-23-2018, 08:06 AM
I posted that simply to make ya'll feel better about yourselves :wink:
15 replies | 267 view(s)
• 05-22-2018, 07:31 PM
Gotcha!!
15 replies | 267 view(s)
• 05-22-2018, 05:57 PM
Agree. No sisters but alotta brudders....
15 replies | 267 view(s)
• 05-22-2018, 12:47 PM
So, if answer is 2/7 = 4/14, then each of 1st 2 players has 5/14 chance, so chances reduced by a rather small 1/14 for being 1st odd man out. ...
6 replies | 188 view(s)
• 05-21-2018, 01:05 PM
Similarly with powers; example: if a^x = a^y then x = y; got that?
10 replies | 236 view(s)
• 05-21-2018, 09:09 AM
The "stated" APR should be "122.07 APR COMPOUNDED MONTHLY", which results in TK's 219.80% which is the EFFECTIVE RATE. Would not be to the crooks'...
2 replies | 119 view(s)
• 05-19-2018, 05:54 PM
10 * 2^x - 8 * 5^(x-2) = 0 10 * 2^x = 8 * 5^(x-2) = 0 2^x / 5^(x-2) = 8 / 10 Carry on...(remember that 5^(x-2) = 5^x / 5^2)
11 replies | 339 view(s)
• 05-19-2018, 12:20 PM
Your equations: (x-2)^2 + (y-3)^2 = 6 y = -2x^2 + 14x - 1 Simplify and rearrange: x^2 - 4x + y^2 - 6y = -7 -2x^2 + 14x - y = 1 Now...
4 replies | 141 view(s)
• 05-18-2018, 05:01 PM
Ain't even a "guessed right": it's more "luckily matching the silly lecturer's intent"! Wether that stupid interest rate compounds only once per...
11 replies | 435 view(s)
• 05-18-2018, 09:22 AM
com-ple-ment noun 1. something that completes or makes perfect: A good wine is a complement to a good meal. 2. the quantity or amount...
8 replies | 242 view(s)
• 05-18-2018, 09:18 AM
Agree! However, the "exam" was over, and the "class" was kinda fooling around with this...so was simply trying "to be nice" :rolleyes:
8 replies | 242 view(s)
• 05-18-2018, 09:12 AM
Are you sure that's not x^2 + 2x - 8 = 0? Then x = 2 or -4
3 replies | 150 view(s)
• 05-18-2018, 08:55 AM
10 replies | 498 view(s)
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