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Denis
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Denis
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Join Date
02-17-2004
Last Activity
Yesterday
11:17 PM
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Denis
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Yesterday,
07:08 AM
Denis
replied to a thread
Height/Width of a mug, and how many fl oz it has
in
Pre-Algebra
1 fluid ounce = ~1.8047 cubic inches
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3 replies | 65 view(s)
06-22-2017,
07:59 PM
Denis
replied to a thread
Probability fun: A deck of 9 cards, labelled 1 to 9. 4 cards drawn w/ replacement
in
Probability / Statistics
Not really. As long as probability is exact (some formula), not simulated.
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3 replies | 96 view(s)
06-22-2017,
04:47 PM
Denis
replied to a thread
Simplify (x^2-y^2)/(x^2+4xy+3y^2)*(x^2+xy-6y^2)/(x^2+xy-2y^2)
in
Beginning Algebra
Well, I can't tell what you're doing. The original expression is: (x^2 - y^2)/(x^2 + 4xy + 3y^2) multiplied by (x^2 + xy - 6y^2)/(x^2 + xy -...
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9 replies | 28 view(s)
06-22-2017,
03:09 PM
Denis
started a thread
Probability fun: A deck of 9 cards, labelled 1 to 9. 4 cards drawn w/ replacement
in
Probability / Statistics
A deck of 9 cards, labelled 1 to 9. 4 cards are drawn WITH REPLACEMENT. What's the probability of getting a pair and 2 different other...
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3 replies | 96 view(s)
06-22-2017,
01:14 PM
Denis
replied to a thread
Simplify (x^2-y^2)/(x^2+4xy+3y^2)*(x^2+xy-6y^2)/(x^2+xy-2y^2)
in
Beginning Algebra
YES there is: assign a value to x and y, like x=2 and y=3; original expression = simplified version?
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9 replies | 28 view(s)
06-22-2017,
08:34 AM
Denis
replied to a thread
Manipulating chemistry equation to form quadratic equation
in
Beginning Algebra
Your result is correct assuming initial equation is: .3 = x^2 / (.2 - x) Make sure you understand why the brackets are required.
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10 replies | 722 view(s)
06-21-2017,
08:54 AM
Denis
replied to a thread
Using the PMT function
in
Finance/Business Math
Your problem is unclear. Usually, a PMT function calculates the periodic payment required to pay off a loan over n periods at a given interest...
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2 replies | 78 view(s)
06-20-2017,
12:44 PM
Denis
replied to a thread
Geometry of the parabola Chord of ContactFurther theorems
in
Geometry and Trig
So is your son ok now?
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2 replies | 98 view(s)
06-20-2017,
12:40 PM
Denis
replied to a thread
Simultaneous equations (tough one): 8^x 64^y = 128, sqrt[12y - 7] = x
in
Intermediate/Advanced Algebra
Or: http://www.wolframalpha.com/input/?i=8%5Ex+*+64%5Ey+-+128+%3D+0,+x%5E2+-+12*y+%2B+7+%3D+0
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18 replies | 516 view(s)
06-19-2017,
12:12 PM
Denis
replied to a thread
Simultaneous equations (tough one): 8^x 64^y = 128, sqrt[12y - 7] = x
in
Intermediate/Advanced Algebra
According to 1st post, the OP apparently was learning how to solve "2 unknowns, 2 equations" problems. I showed one possible solution to his 1st...
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18 replies | 516 view(s)
06-19-2017,
08:54 AM
Denis
replied to a thread
v-Bulletin issues of late
in
Administration Issues
I will be replying in a few hours...
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28 replies | 2909 view(s)
06-18-2017,
11:17 PM
Denis
replied to a thread
Simultaneous equations (tough one): 8^x 64^y = 128, sqrt[12y - 7] = x
in
Intermediate/Advanced Algebra
8^x * 64^y = 128 SQRT(12y - 7) = x By inspection of , easily seen that x=1/3 and y=1. Seems that contains a typo(s)....
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18 replies | 516 view(s)
06-18-2017,
06:57 PM
Denis
replied to a thread
Cryptic clue (Jun.16)
in
Math Odds & Ends
r. 1. rabbi. 2. railroad. 3. railway. 4. range. 5.
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7 replies | 247 view(s)
06-18-2017,
11:40 AM
Denis
replied to a thread
Cryptic clue (Jun.16)
in
Math Odds & Ends
Race is correct. r = race appears in Dictionary.com. stock = race appears in Dictionary.com Synonyms.
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7 replies | 247 view(s)
06-18-2017,
11:17 AM
Denis
replied to a thread
Please help wth this Find the smallest integer n for which 0.7 ^n < 0.003
in
Intermediate/Advanced Algebra
Also: if x^n = y then n = log(y) / log(x)
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2 replies | 128 view(s)
06-18-2017,
12:06 AM
Denis
replied to a thread
Rebus (Jun.16)
in
Math Odds & Ends
Right on Ks!!
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10 replies | 322 view(s)
06-17-2017,
11:38 PM
Denis
replied to a thread
Rebus (Jun.16)
in
Math Odds & Ends
Hint: "comes" has 2 more o
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10 replies | 322 view(s)
06-17-2017,
11:32 PM
Denis
replied to a thread
Cryptic clue (Jun.16)
in
Math Odds & Ends
Yes, one = ace.
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7 replies | 247 view(s)
06-17-2017,
11:28 PM
Denis
replied to a thread
DRT Problem - Verify that I did it correctly?
in
Intermediate/Advanced Algebra
See post#4: cycling D : 120 km R : 8x T : 9 - t swimming D : 12 km R : x T : t
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9 replies | 356 view(s)
06-16-2017,
12:55 PM
Denis
started a thread
Cryptic clue (Jun.16)
in
Math Odds & Ends
Rare one in stock? (4)
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7 replies | 247 view(s)
06-16-2017,
12:53 PM
Denis
started a thread
Rebus (Jun.16)
in
Math Odds & Ends
never cooomes (3 words)
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10 replies | 322 view(s)
06-15-2017,
07:39 PM
Denis
replied to a thread
Selling the note before its maturity: Ramli decides to sell away his car....
in
Finance/Business Math
Hint: 9100 + 250-90 days' interest = original maturity amount. Suggestion: use 360 days as a year.
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3 replies | 248 view(s)
06-14-2017,
10:02 PM
Denis
replied to a thread
Dividing Polynomials: (x^5 + 1)/(x^3 +1) = x^2 remainder -x^2 + 1
in
Intermediate/Advanced Algebra
x^2 ------------- x^3 + 1 / x^5 + 1 x^5 + x^2 --------- Hokay?
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4 replies | 258 view(s)
06-13-2017,
11:17 PM
Denis
replied to a thread
Common Type of Problem involving Rtn'l Eqns: Melanie drove 404 km from Point A to...
in
Intermediate/Advanced Algebra
time = distance / speed
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4 replies | 251 view(s)
06-13-2017,
03:44 PM
Denis
replied to a thread
Expressing contribution to a rate (houses built per worker)
in
Finance/Business Math
You state in your 1st post: "One example would be: "a 10% increase in the number of workers for Team B would improve the firm's overall rate by...
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3 replies | 226 view(s)
06-13-2017,
10:05 AM
Denis
replied to a thread
simplify rational: (3x-12/x)/(x-2/3/(x+1))
in
Intermediate/Advanced Algebra
This is the simplification IF the expression is how you're showing it:...
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19 replies | 1349 view(s)
06-12-2017,
11:42 PM
Denis
replied to a thread
Choosing Names for a Higher Level?
in
Math Odds & Ends
YA...wonder why they didn't call themselves the "Nashville Cats" (after the Lovin' Spoonful song)...
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8 replies | 340 view(s)
06-12-2017,
11:45 AM
Denis
replied to a thread
Expressing contribution to a rate (houses built per worker)
in
Finance/Business Math
Are you in the construction business, or is this a classroom question? Regardless, is the A:B = 2.08:4.40 ratio due to the speed of the workers...
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3 replies | 226 view(s)
06-12-2017,
11:28 AM
Denis
replied to a thread
Choosing Names for a Higher Level?
in
Math Odds & Ends
Well, you could call me God too: I'm jealous :cool:
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8 replies | 340 view(s)
06-12-2017,
07:57 AM
Denis
replied to a thread
Solving 3 variables with 3 equations
in
Intermediate/Advanced Algebra
Try this: Assign values to the variables; like x=2, y=3 and h=4; then: x + y = 5 x^2 + h^2 = 20 y^2 + h^2 = 25 Now try to solve; you'll...
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2 replies | 155 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
Yesterday
11:17 PM
Join Date
02-17-2004
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