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Denis
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Denis
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Join Date
02-17-2004
Last Activity
Yesterday
11:14 PM
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Denis
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Yesterday,
09:32 PM
Denis
replied to a thread
Name the postulate or theorem you can use to prove two triangles are equal.
in
Geometry and Trig
So is Jomo :p
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11 replies | 464 view(s)
Yesterday,
07:04 PM
Denis
replied to a thread
Name the postulate or theorem you can use to prove two triangles are equal.
in
Geometry and Trig
necro- Word Origin 1. a combining form meaning “the dead,” “corpse,” “dead tissue,” used in the formation of compound words.
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11 replies | 464 view(s)
Yesterday,
01:40 PM
Denis
replied to a thread
SPAMmer
in
Math Odds & Ends
Thanks for being interested Jomo. Part 2 is really "fun?" :rolleyes:
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2 replies | 53 view(s)
Yesterday,
08:05 AM
Denis
started a thread
SPAMmer
in
Math Odds & Ends
SPAM CANS PART 1: -you are standing next to a pile of Spam cans -these are sufficient in number to complete this puzzle! -you wish to walk a...
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2 replies | 53 view(s)
03-16-2018,
04:26 PM
Denis
replied to a thread
Find A: If SinA = 2Cos^2A, find A.
in
Geometry and Trig
Ahhhh....found it: there's 2 of them on left of .R :cool:
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3 replies | 64 view(s)
03-15-2018,
01:36 PM
Denis
replied to a thread
Need help on this combination for my email password ("chimpanzees", w/ "chimp" known)
in
Probability / Statistics
Monsieur Levis, you are cruel :p
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3 replies | 111 view(s)
03-15-2018,
01:09 PM
Denis
replied to a thread
Factorise expression HELP: Does 8ax + 40cx + 3a +18c equal (8x + 3)(a + c) ?
in
Beginning Algebra
Save yourself (and us) time by checking by assigning values; as example: a=2, c=4 and x=3 (any values will work). Then: 8ax + 40cx + 3a +18c = 606...
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13 replies | 334 view(s)
03-15-2018,
12:53 PM
Denis
replied to a thread
Factorise expression HELP: Does 8ax + 40cx + 3a +18c equal (8x + 3)(a + c) ?
in
Beginning Algebra
BAD PRACTICE to update/edit an original post after others have used it in order to help you... everything gets confused...
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13 replies | 334 view(s)
03-15-2018,
12:45 PM
Denis
replied to a thread
Mathematics: Wanting to re-learn from the ground up, through undergraduate classes
in
Arithmetic
Were you "really weak" or was it lack of interest?
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7 replies | 230 view(s)
03-14-2018,
05:00 PM
Denis
replied to a thread
If 2^x = 10, then how to calculate the value of 'x'?
in
Intermediate/Advanced Algebra
http://www.wolframalpha.com/input/?i=x+-+3!+%3D+0 :razz::rolleyes::razz:
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36 replies | 688 view(s)
03-14-2018,
12:36 PM
Denis
replied to a thread
Sound localisation using multilateration?
in
Geometry and Trig
What does that mean, and why is it important?
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3 replies | 130 view(s)
03-14-2018,
12:15 PM
Denis
replied to a thread
how to calculate the value of 'x', If 16^x = 2?
in
Intermediate/Advanced Algebra
Go here (you'll become a quick LOGger!): http://home.windstream.net/okrebs/page56.html
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12 replies | 269 view(s)
03-14-2018,
08:44 AM
Denis
replied to a thread
A circular disk expands and contracts when heated/cooled.
in
Beginning Algebra
Problem is same as: A1 = area of circle with radius = x + 2 A2 = area of circle with radius = x - 2 Show that A1 - A2 = 8*pi*x Hint:...
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2 replies | 111 view(s)
03-13-2018,
02:35 PM
Denis
replied to a thread
If 2^x = 10, then how to calculate the value of 'x'?
in
Intermediate/Advanced Algebra
2^3 = 8 2^3.1 = ~8.57 2^3.2 = ~9.19 2^3.3 = ~9.85 2^3.4 = ~10.56 Whoa! 2^3.31 = ~9.92 carry on... Get my drift?
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36 replies | 688 view(s)
03-13-2018,
12:40 PM
Denis
replied to a thread
mathematical word?
in
Math Odds & Ends
Careful...else they'll throw you in the Khan...
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5 replies | 130 view(s)
03-12-2018,
10:26 PM
Denis
replied to a thread
mathematical word?
in
Math Odds & Ends
Khan't you be more specific !!
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5 replies | 130 view(s)
03-12-2018,
08:01 PM
Denis
started a thread
mathematical word?
in
Math Odds & Ends
epilog ?
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5 replies | 130 view(s)
03-12-2018,
10:01 AM
Denis
replied to a thread
Combinatorics: 10 scarfs, 8 shirts and 9 hats to 4 people
in
Probability / Statistics
So looks like 1 person can get 'em all...right? odd natural numbers are 1,3,5,7,......right? so 1,1,1,1,1,35 is a solution, and 35 is highest...
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4 replies | 154 view(s)
03-11-2018,
10:45 PM
Denis
replied to a thread
Calculate present value of SEK 5,000 received in 12 months w/ 10% APR comp'd qtrly
in
Finance/Business Math
Your teacher did not provide the formula? $1000.00 * 1.025 = $1025.00 is the future value of $1000.00 in 3 months if rate = 10% annual...
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1 replies | 88 view(s)
03-11-2018,
02:21 PM
Denis
replied to a thread
Justify each step with a property, definition or an operation
in
Beginning Algebra
a - b = c a -(-b) = a + b : simply cancels operation ????:confused:
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10 replies | 327 view(s)
03-10-2018,
09:03 PM
Denis
replied to a thread
I need to reverse engineer this mathematical dealer car value!
in
Intermediate/Advanced Algebra
Amen...:p
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7 replies | 233 view(s)
03-09-2018,
08:46 PM
Denis
replied to a thread
I need to reverse engineer this mathematical dealer car value!
in
Intermediate/Advanced Algebra
You're worried about $13 on a car selling for over $32,000 :confused:
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7 replies | 233 view(s)
03-09-2018,
01:17 PM
Denis
replied to a thread
Problem for game "Forum Mafia" w/ 13 players, 10 good guys and 3 bad guys.
in
Probability / Statistics
...and you should be sober when formulating a question :rolleyes:
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11 replies | 379 view(s)
03-09-2018,
09:40 AM
Denis
replied to a thread
Multiplication of arithmetic series to get 3rd series w/ 1st 3 terms: 468, 462, 384
in
Intermediate/Advanced Algebra
Make up and play around with a short simple example, like: 2 5 8 11 3 7 11 15 ------------ 6 35 88 165
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11 replies | 299 view(s)
03-08-2018,
07:13 PM
Denis
replied to a thread
How to work out Effective Yield for Investment Plans with different payout time?
in
Finance/Business Math
Rounding your amounts to 95,700 and 981 r = return rate This equation needs to be solved for r: 981 / r = 95700(1 + r)^300 As TK says, cannot...
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2 replies | 97 view(s)
03-08-2018,
05:32 PM
Denis
replied to a thread
Find new salary: Sue is paid salary of $440/week plus 7% of all sales over $5000.
in
Finance/Business Math
After some googling of "returns and allowances" and "withholding allowances", pretty sure it works like this: Sales: 12,938.00 - 417.58 =...
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5 replies | 249 view(s)
03-08-2018,
02:46 PM
Denis
replied to a thread
Formula to calculate cost of increasing annual expense after a given number of years?
in
Finance/Business Math
Works like a savings account with annual deposits: YEAR DEPOSIT INTEREST BALANCE 0 .00 1 1000.00 ...
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5 replies | 123 view(s)
03-08-2018,
01:56 PM
Denis
replied to a thread
Find all angles
in
Geometry and Trig
Boy oh boy...sure sounds as if you're joking... May I ask, so we know HOW to answer/help you: are you a student attending math classes?
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21 replies | 828 view(s)
03-07-2018,
02:50 PM
Denis
replied to a thread
If a Diagonal is drawn on each side of a Cube, how many different patterns possible?
in
Geometry and Trig
Thanks Barrick. From now on, I'll be nervous when I drop a sugar cube in my coffee...:p
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6 replies | 397 view(s)
03-07-2018,
01:04 PM
Denis
replied to a thread
Efficiency of my new HVAC system?
in
Arithmetic
Not sure what you're asking. Anyhow, this makes your 23% more realistic: x = electricity used last Feb; if 29% more: 1.29x y = electricity...
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3 replies | 188 view(s)
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About Denis
Basic Information
About Denis
Location:
Ottawa, Ontario
Interests:
puzzles
Occupation:
retired
Signature
I'm just an imagination of your figment !
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16,870
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Last Activity
Yesterday
11:14 PM
Join Date
02-17-2004
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