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Denis
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Denis
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Join Date
02-17-2004
Last Activity
Today
10:03 PM
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Denis
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Today,
05:46 PM
Denis
replied to a thread
Simplification Clarification
in
Arithmetic
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...
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3 replies | 74 view(s)
Today,
05:16 PM
Denis
replied to a thread
Formula for angle in Polygon
in
Geometry and Trig
....or 180(n-3)/n
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11 replies | 99 view(s)
Today,
11:22 AM
Denis
replied to a thread
Can someone explain the answer but a bit clearer?
in
Math Odds & Ends
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...
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3 replies | 87 view(s)
Yesterday,
05:35 PM
Denis
replied to a thread
Finding number of sides of regular polygon with different interior angles?
in
Geometry and Trig
Soooo....what is size of each of the interior angles?
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8 replies | 130 view(s)
Yesterday,
01:43 PM
Denis
replied to a thread
Solve system of eqns: xz-2yt=3, xt+yz=1; Find x2+y2+z2+t2 (x,y,z,t integers)
in
Advanced Math
Also means that x >= 3y (but that's not much help!)
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2 replies | 235 view(s)
Yesterday,
12:30 PM
Denis
replied to a thread
Finding number of sides of regular polygon with different interior angles?
in
Geometry and Trig
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. ...
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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.
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4 replies | 101 view(s)
Yesterday,
09:54 AM
Denis
replied to a thread
9) Find perimeter, Area of triangle CRT (altitude TA to CR, TR=45, AR=27)
in
Geometry and Trig
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)
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6 replies | 124 view(s)
Yesterday,
09:35 AM
Denis
replied to a thread
Solving Equations Using Rational Expressions: Simplify x/(x+3) + (9x+18)/(x^2+3x)
in
Intermediate/Advanced Algebra
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...
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4 replies | 171 view(s)
05-23-2018,
07:33 PM
Denis
replied to a thread
Given sets U, W of pts in R^3, find finite set for W cutting U
in
Intermediate/Advanced Algebra
A true friend steps in when the rest of the world steps out... A friend is a friend in spite of, not because of...
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10 replies | 214 view(s)
05-23-2018,
07:16 PM
Denis
replied to a thread
Given sets U, W of pts in R^3, find finite set for W cutting U
in
Intermediate/Advanced Algebra
We're ALL as advanced as we were when we stopped!! PLUS we're all here because we're not all there :rolleyes:
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10 replies | 214 view(s)
05-23-2018,
07:10 PM
Denis
replied to a thread
12: solve triangle w/ base 14, angle 32*; 14: solve isosceles rt triangle w/ hyp 16
in
Geometry and Trig
You possibly could be a "she"; never told us :rolleyes:
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11 replies | 237 view(s)
05-23-2018,
04:10 PM
Denis
replied to a thread
Given sets U, W of pts in R^3, find finite set for W cutting U
in
Intermediate/Advanced Algebra
Halls has no friends!!
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10 replies | 214 view(s)
05-23-2018,
03:31 PM
Denis
replied to a thread
12: solve triangle w/ base 14, angle 32*; 14: solve isosceles rt triangle w/ hyp 16
in
Geometry and Trig
We don't even know if "he" is correct!
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11 replies | 237 view(s)
05-23-2018,
01:19 PM
Denis
replied to a thread
12: solve triangle w/ base 14, angle 32*; 14: solve isosceles rt triangle w/ hyp 16
in
Geometry and Trig
Hey "happiness", you never told us: are you a student attending math classes?
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11 replies | 237 view(s)
05-23-2018,
12:34 PM
Denis
replied to a thread
What will the sex ratio in this country be? More males or females?
in
Probability / Statistics
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...
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15 replies | 267 view(s)
05-23-2018,
12:15 PM
Denis
replied to a thread
How to calculate the lowest possible integer value of 100% from 5 percentage values?
in
Arithmetic
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...
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4 replies | 116 view(s)
05-23-2018,
08:06 AM
Denis
replied to a thread
What will the sex ratio in this country be? More males or females?
in
Probability / Statistics
I posted that simply to make ya'll feel better about yourselves :wink:
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15 replies | 267 view(s)
05-22-2018,
07:31 PM
Denis
replied to a thread
What will the sex ratio in this country be? More males or females?
in
Probability / Statistics
Gotcha!!
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15 replies | 267 view(s)
05-22-2018,
05:57 PM
Denis
replied to a thread
What will the sex ratio in this country be? More males or females?
in
Probability / Statistics
Agree. No sisters but alotta brudders....
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15 replies | 267 view(s)
05-22-2018,
12:47 PM
Denis
replied to a thread
Probability: Danielle, Lilliana, Melody play fighting video game in tournament mode
in
Probability / Statistics
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. ...
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6 replies | 188 view(s)
05-21-2018,
01:05 PM
Denis
replied to a thread
How to calculate the value of b if the equation is 1/T^2=1/T^b?
in
Beginning Algebra
Similarly with powers; example: if a^x = a^y then x = y; got that?
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10 replies | 236 view(s)
05-21-2018,
09:09 AM
Denis
replied to a thread
Installment loan APR: $260.00 loan w/ $100.00 finance charge; $60/mo paid for 6 mo's
in
Finance/Business Math
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'...
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2 replies | 119 view(s)
05-19-2018,
05:54 PM
Denis
replied to a thread
solve eqn w/ variable in exponent using logarithms: 10*2^x - 8*5^(x-2) = 0
in
Intermediate/Advanced Algebra
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)
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11 replies | 339 view(s)
05-19-2018,
12:20 PM
Denis
replied to a thread
Point of intersection of circle (x-2)^2+(y-3)^2=6, parabola y=-2x^2+14x-1
in
Beginning Algebra
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...
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4 replies | 141 view(s)
05-18-2018,
05:01 PM
Denis
replied to a thread
Payout Annuity Problem: Jim won jackpot of $15 million
in
Finance/Business Math
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...
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11 replies | 435 view(s)
05-18-2018,
09:22 AM
Denis
replied to a thread
AS paper: Prove every prime > 5, when raised to 4th power, ends in 1
in
Intermediate/Advanced Algebra
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...
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8 replies | 242 view(s)
05-18-2018,
09:18 AM
Denis
replied to a thread
AS paper: Prove every prime > 5, when raised to 4th power, ends in 1
in
Intermediate/Advanced Algebra
Agree! However, the "exam" was over, and the "class" was kinda fooling around with this...so was simply trying "to be nice" :rolleyes:
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8 replies | 242 view(s)
05-18-2018,
09:12 AM
Denis
replied to a thread
Have to solve x^2 + 2x + 8 = 0; answer should be R
in
Beginning Algebra
Are you sure that's not x^2 + 2x - 8 = 0? Then x = 2 or -4
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3 replies | 150 view(s)
05-18-2018,
08:55 AM
Denis
replied to a thread
Old account issue: please help
in
Administration Issues
Was this the account: https://www.freemathhelp.com/forum/threads/69299-split-decagon-Geometry-Homework?highlight=mathwhiz Can't help you...
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10 replies | 498 view(s)
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About Denis
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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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