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Denis
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Denis
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Join Date
02-17-2004
Last Activity
Yesterday
10:30 PM
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Denis
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Yesterday,
09:49 AM
Denis
replied to a thread
A rebus
in
Math Odds & Ends
He with nary a smile Is but the shadow of his inner child “A professor is someone who talks in someone else’s sleep”:rolleyes:
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7 replies | 240 view(s)
10-18-2018,
11:21 PM
Denis
replied to a thread
Cryptic Thread?
in
Math Odds & Ends
dnarts !!
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6 replies | 289 view(s)
10-18-2018,
11:12 PM
Denis
replied to a thread
Cryptic Regards?
in
Math Odds & Ends
Since when is loop's plural; loops is plural...no? Anyhoo....must go put drops in my EYES...
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5 replies | 294 view(s)
10-18-2018,
11:00 PM
Denis
replied to a thread
A rebus
in
Math Odds & Ends
Dan, go to H.ELL :mrgreen:
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7 replies | 240 view(s)
10-18-2018,
08:22 PM
Denis
replied to a thread
Cryptic Thread?
in
Math Odds & Ends
So your clue "direct on right" should be "direct on left and right" :confused:
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6 replies | 289 view(s)
10-18-2018,
08:18 PM
Denis
replied to a thread
A rebus
in
Math Odds & Ends
Yepper!!
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7 replies | 240 view(s)
10-18-2018,
08:17 PM
Denis
replied to a thread
Basic Math Puzzle Grid (Add, Subtract, Multiply, Divide)
in
Math Odds & Ends
Got it...don't wanna post full solution...middle of bottom line = 8 Tricky little mudder!!
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2 replies | 55 view(s)
10-18-2018,
07:23 PM
Denis
replied to a thread
Net present value (NPV), annual equivalent (AE): investor has 2 alternative projects
in
Finance/Business Math
Hokay....here we go! Basic formula is present value of annuity: p = a/i : a = annuity amount, i = interest rate, n = number of periods Project...
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6 replies | 176 view(s)
10-18-2018,
05:57 PM
Denis
replied to a thread
Don't you be no square!
in
Math Odds & Ends
Yepper Doc! 1 also works. The Romans are coming! |V = 4 |X = 9 [ = 100
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2 replies | 43 view(s)
10-18-2018,
04:09 PM
Denis
replied to a thread
Height of a tree
in
Arithmetic
Measure your shadow and the tree's shadow: u = yours, v = tree's y = your height (which you know!) t = tree's height (?) y/u = t/v Go to...
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8 replies | 100 view(s)
10-18-2018,
02:21 PM
Denis
replied to a thread
Net present value (NPV), annual equivalent (AE): investor has 2 alternative projects
in
Finance/Business Math
Not important, but are you sure of your figures? Project A total outlay: 700,000 + 115,000*5 + 1,500,000 + 105,000*20 = 4,875,000 Project B total...
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6 replies | 176 view(s)
10-18-2018,
01:51 PM
Denis
started a thread
Don't you be no square!
in
Math Odds & Ends
Draw a square using only 3 straight lines...
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2 replies | 43 view(s)
10-18-2018,
01:48 PM
Denis
replied to a thread
geometry semi circle problem
in
Geometry and Trig
Easier still: straight line from center of circle to an upper corner = radius, and creates ye olde 30-60-90 triangle with sides 3,6,r ....
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11 replies | 113 view(s)
10-18-2018,
01:40 PM
Denis
replied to a thread
Working out area: How many people can sleep in the tent?
in
Geometry and Trig
Did everyone sleep well?
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3 replies | 86 view(s)
10-18-2018,
01:37 PM
Denis
replied to a thread
Conjecture an expression for Sn if Sn = u1+u2+...un where Un = n*n!
in
Intermediate/Advanced Algebra
Gets to scary large terms quickly: 1, 5, 23, 119, 719, 5039, 40319, 362879, 3628799, 39916799, 479001599, 6227020799, 87178291199, 1307674367999,...
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3 replies | 66 view(s)
10-18-2018,
01:18 PM
Denis
replied to a thread
basic quadratics help for equation 6m^2 + 11mn + 3n^2
in
Beginning Algebra
Lazy me prefers using the quadratic equation, which leads to: a = -3b/2 or -b/3
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6 replies | 163 view(s)
10-18-2018,
12:47 PM
Denis
replied to a thread
How to calculate this tower
in
Arithmetic
answer: INT where r <> 0
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2 replies | 64 view(s)
10-17-2018,
07:58 PM
Denis
replied to a thread
Net present value (NPV), annual equivalent (AE): investor has 2 alternative projects
in
Finance/Business Math
Yes...if the 1st $1000 is deposited at same time as the $5000... Would be 11,499.59 if 1 year later...agree? I was asking if you had the answer...
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6 replies | 176 view(s)
10-17-2018,
12:23 PM
Denis
replied to a thread
Equilateral triangle, perimeter and area? idk what to call this
in
Geometry and Trig
HINT: "look for a 30-60-90 triangle" :cool:
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4 replies | 74 view(s)
10-17-2018,
12:10 PM
Denis
replied to a thread
I need help with linear programming: The shelter has space for up to 25 dogs...
in
Intermediate/Advanced Algebra
As worded, answer is 25 + 45 = 70 ; simply both at capacity...
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2 replies | 49 view(s)
10-16-2018,
11:57 PM
Denis
replied to a thread
Where's the fallacy in this proof? (that 1 - 1 equals 2)
in
Beginning Algebra
To the corner for 4^2 minutes...with no smartphone!!
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7 replies | 251 view(s)
10-15-2018,
10:37 PM
Denis
replied to a thread
Help Finding Perfect Square Inequalities Practice Problems
in
Intermediate/Advanced Algebra
HOKAY...you buy him some paper...
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10 replies | 130 view(s)
10-15-2018,
01:21 PM
Denis
replied to a thread
Help Finding Perfect Square Inequalities Practice Problems
in
Intermediate/Advanced Algebra
You don't have a pencil?
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10 replies | 130 view(s)
10-15-2018,
01:19 PM
Denis
replied to a thread
Help Finding Perfect Square Inequalities Practice Problems
in
Intermediate/Advanced Algebra
AGREE...good advice!!
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10 replies | 130 view(s)
10-14-2018,
10:02 PM
Denis
replied to a thread
Bedmas Questions: Why does (3*5*10)/3 =/= 3*3^-1 * 5*3^-1 * 10*3^-1
in
Arithmetic
Are you a student attending math classes?
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6 replies | 182 view(s)
10-14-2018,
03:50 PM
Denis
replied to a thread
Induction problem: Company ships sandwiches in boxes of 3 or 5 each.
in
Intermediate/Advanced Algebra
Google "chicken nuggets math"
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4 replies | 126 view(s)
10-14-2018,
02:48 PM
Denis
replied to a thread
Net present value (NPV), annual equivalent (AE): investor has 2 alternative projects
in
Finance/Business Math
Well, hard to help if we don't know "where you're at". Can you answer this: If you deposit $5000 now, then $1000 annually for 5 years, how much...
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6 replies | 176 view(s)
10-11-2018,
11:31 PM
Denis
replied to a thread
Segment Problem: Y is between X and Z, find XY. XZ=26 and XY = 3x+2.
in
Geometry and Trig
X (3x+2) Y (26-3x-2) Z If that's what the intent is, then EASY...
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2 replies | 158 view(s)
10-11-2018,
11:22 PM
Denis
replied to a thread
Simplify: Xt = Xt-1 [1- (1/n-t) - r]
in
Intermediate/Advanced Algebra
97% sure a "formula" not possible. If one is possible, I'm sure DrP and/or Jeff will step in and shame me :-P
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11 replies | 322 view(s)
10-11-2018,
05:46 PM
Denis
replied to a thread
Simplify this equation: -(t - 3)^2 + 6(t - 3) - 11
in
Beginning Algebra
If the 1st term is kinda confusing you, pretend the leading - sign ain't there: (t - 3)^2 = (t - 3)*(t - 3) = t^2 - 6t + 9 Now multiply by -1:...
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7 replies | 216 view(s)
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About Denis
Basic Information
About Denis
Location:
Ottawa, Ontario
Interests:
puzzles
Occupation:
retired
Signature
I'm a man of few words...but I use 'em often!!
Statistics
Total Posts
Total Posts
535
Posts Per Day
0.10
General Information
Last Activity
Yesterday
10:30 PM
Join Date
02-17-2004
Referrals
4