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Denis
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Denis
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Join Date
02-17-2004
Last Activity
Today
04:58 PM
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Denis
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Today,
03:31 PM
Denis
replied to a thread
How to figure a bill
in
Arithmetic
You're only making the situation more ridiculous. So there are 2 apartments: ONLY one bill covers both?! Why don't you contact the bill issuer and...
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6 replies | 143 view(s)
Yesterday,
03:40 PM
Denis
replied to a thread
How to figure a bill
in
Arithmetic
Hint: 5 people owe for 18 days, 3 people owe for 11 days
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6 replies | 143 view(s)
Yesterday,
08:06 AM
Denis
replied to a thread
30 math questions: solve them with details
in
Beginning Algebra
Well, evident that driver will rest only once, since distance over 1st 2 hours = 300km. So solve problem: time to travel 500km, then add an...
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13 replies | 654 view(s)
08-20-2017,
11:57 PM
Denis
replied to a thread
GRE Quant part Geometry
in
Geometry and Trig
Cut the darn box in half: then volume = 64 a^3 = 64 Next: actual height = 2a
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10 replies | 362 view(s)
08-17-2017,
12:19 PM
Denis
replied to a thread
Exponential functions problem
in
Intermediate/Advanced Algebra
Can you solve this similar one: At r% annually, money doubles every 5 years. Calculate r.
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2 replies | 104 view(s)
08-16-2017,
10:39 PM
Denis
replied to a thread
Why does the sign need to change?
in
Beginning Algebra
Cymath did everything correctly; x = -1/50 is correct. You're questioning -(2x/3 - 1) = -2x/3 + 1 : that's correct. That's really -1*(2x/3 - 1)....
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4 replies | 226 view(s)
08-12-2017,
01:23 PM
Denis
replied to a thread
simplify & fractorise: find the sum of 2a + 3b + 5c and a + b -c, ...
in
Beginning Algebra
If your "x" is a multiplication sign, then start using "*" instead; 3*4 = 12. The 4 basics: + - / *
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4 replies | 327 view(s)
08-12-2017,
01:15 PM
Denis
replied to a thread
Solving a system of Equations for Two Variables
in
Intermediate/Advanced Algebra
In case useful to you; take the 1st equation: b/5 = 2/5 - (a - 3)/2 Much easier if you start this way: 2/5 - b/5 = (a - 3)/2 Then: (2 - b)/5 =...
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3 replies | 216 view(s)
08-09-2017,
12:23 PM
Denis
replied to a thread
Which rate is used in amortization - Nominal APR or Effective?
in
Finance/Business Math
To see where you're at: if rate is 12% APR, what is the effective annual rate? if rate is 12% APR compounded semi-annually, what is the...
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2 replies | 179 view(s)
08-08-2017,
11:39 AM
Denis
replied to a thread
Test, just a test
in
News
Subhotosh, is that your son? :rolleyes:
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2 replies | 449 view(s)
08-08-2017,
11:35 AM
Denis
replied to a thread
need to divide 2,220,000 into *something*, then that *something* into *something else
in
Beginning Algebra
Strange problem indeed! a = original amount (2220000) x = 1st divisor (something!) y = 2nd divisor (something else!) r = remainder (406) ...
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4 replies | 403 view(s)
08-08-2017,
01:02 AM
Denis
replied to a thread
Cryptic Court?
in
Math Odds & Ends
Hockey sticks are sacred items!!
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6 replies | 477 view(s)
08-08-2017,
12:58 AM
Denis
replied to a thread
8% of rides are water rides; if 4 are water rides, how many rides total?
in
Arithmetic
Please show your work, and where you're stuck.
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5 replies | 709 view(s)
08-07-2017,
08:01 PM
Denis
replied to a thread
Cryptic Court?
in
Math Odds & Ends
No :rolleyes:
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6 replies | 477 view(s)
08-07-2017,
01:11 PM
Denis
replied to a thread
Cryptic Court?
in
Math Odds & Ends
answer = acoustic a = a cou = first triplet of "cou"sin stic = st"at"ic - at
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6 replies | 477 view(s)
08-05-2017,
12:44 PM
Denis
replied to a thread
Boxes - Volume: Prisha has two cubical boxes of different sizes....
in
Beginning Algebra
Do you know what a "cubical box" means?
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4 replies | 414 view(s)
08-03-2017,
01:26 PM
Denis
replied to a thread
7th Heaven
in
Math Odds & Ends
NICE video! And took you 6 years to find it? :confused:
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5 replies | 1523 view(s)
08-02-2017,
12:28 PM
Denis
replied to a thread
Machine component question? life-expectancy is f(x) = 13 + 12.5 ln(x), for month x
in
Intermediate/Advanced Algebra
Have you tried using the way your teacher gave you?
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3 replies | 304 view(s)
08-02-2017,
02:44 AM
Denis
replied to a thread
Find Angle with three (x, y) coordinate points
in
Geometry and Trig
If you're learning, may be easier to use simpler coordinates; like: A(56,-251), B(82,-236), C(69,-244)
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4 replies | 313 view(s)
08-01-2017,
04:55 PM
Denis
replied to a thread
MOZAA: What's the math behind this game?
in
Probability / Statistics
WHO says there is such a "formula"?
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6 replies | 471 view(s)
07-31-2017,
11:47 AM
Denis
replied to a thread
Uniform Possibilities: how many different outfits from 4 shirt colors, 3 pants colors
in
Probability / Statistics
I added an ashgrey shirt and didn't tell anyone...:rolleyes:
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4 replies | 410 view(s)
07-31-2017,
11:42 AM
Denis
replied to a thread
Real Estate Problem: Find original cost, if house sold for $245,000.
in
Finance/Business Math
originally = x asking = 1.15x selling = .89(1.15x) = 245000 So?
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3 replies | 481 view(s)
07-30-2017,
07:42 PM
Denis
replied to a thread
Uniform Possibilities: how many different outfits from 4 shirt colors, 3 pants colors
in
Probability / Statistics
Looks simple to me (so I must be missing something...): 5 shirts with each pants...so 15:confused:
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4 replies | 410 view(s)
07-30-2017,
07:31 PM
Denis
replied to a thread
why the answer to the following is 330? C(2012) = 103 + 15(2012 - 1990 [22]) = 330
in
Pre-Algebra
Means that 15(2012 - 1990 ) = 330 - 103 = 227 which is clearly impossible... I see that 15*22 = 330...:confused: What d'heck is supposed to...
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3 replies | 548 view(s)
07-29-2017,
12:19 PM
Denis
replied to a thread
To find loci of a point
in
Geometry and Trig
Hmmm...a bit difficult to "follow": does that mean that when circleA is situated with center on the horizontal line, then it will be tangent to...
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4 replies | 349 view(s)
07-29-2017,
12:12 PM
Denis
replied to a thread
Pre-Cal Problem: sound cone formed by jet traveling at 1850 mph
in
Intermediate/Advanced Algebra
At that speed, you'll probably get a "double scoop" cone :rolleyes:
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4 replies | 497 view(s)
07-29-2017,
12:12 PM
Denis
replied to a thread
Pre-Cal Sound Cone Problem
in
Intermediate/Advanced Algebra
At that speed, you'll probably get a "double scoop" cone :rolleyes:
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3 replies | 340 view(s)
07-28-2017,
07:40 PM
Denis
replied to a thread
Cryptic Gift
in
Math Odds & Ends
Was that correct? Anyway, thanks. Used it this way at another site: It's included in the 10% fee (5)
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3 replies | 707 view(s)
07-28-2017,
07:34 PM
Denis
replied to a thread
linear equations and logarithms: variables s, t related by equation s = ke^-nt
in
Geometry and Trig
Looks quite "scary" here: http://www.wolframalpha.com/input/?i=express+(e%5E(-n))%5Et+%E2%80%8Bas+a+logarithm
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7 replies | 732 view(s)
07-28-2017,
03:56 PM
Denis
replied to a thread
Work rate problem. Gaz, Bert and Bob: "When Florencia went out into the garden, ..."
in
Beginning Algebra
Aye aye Captain.
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16 replies | 1560 view(s)
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About Denis
Basic Information
About Denis
Location:
Ottawa, Ontario
Interests:
puzzles
Occupation:
retired
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I'm just an imagination of your figment !
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Last Activity
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04:58 PM
Join Date
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