Friday

April 18, 2014

April 18, 2014

Number of results: 44,336

**math**

I got the same answer as Damon. Damon is right.
*Saturday, July 9, 2011 at 9:08pm by Reiny*

**math**

I got the same answer as Damon. Damon is right.
*Saturday, July 9, 2011 at 10:26pm by Reiny*

**For Damon**

Damon, I am having a brain freeze. I know you answer is correct. Can you see the error in my solution?
*Thursday, January 23, 2014 at 1:11am by Reiny*

**Math-Can you help me Damon or Reiny?**

missed a bracket ... P(A|B) is a conditional probability and is defined as P(A∩B) / P(B)
*Thursday, July 28, 2011 at 8:01pm by Reiny*

**Math 112 Help please**

Hey Reiny Thanks for your respond, Damon you and Reiny are on the same track. I'll keeping working on this,. I think I keep missing something. Thanks
*Sunday, April 14, 2013 at 9:26am by Enis*

**Algebra check Damon**

No it is not It sure looks obvious to me that was what Damon told you. To have a one-to-one, both the relation and its inverse must be functions. Yours is not
*Sunday, November 30, 2008 at 7:59pm by Reiny*

**Reiny or Damon or Bobpursley **

Express the series 11 + 18 + 27 +...+ 171 using sigma notation. Usually you would take 27-18 and thats the step between numbers, right? (I think its the k-value?) But 27-18=9 and 18-11=7. Are we stepping by k+2 here? Like k, k+2 k+4, k+6...? Please help me. I'm not confident ...
*Friday, April 27, 2012 at 6:09pm by Tabby*

**Damon - trig**

Damon, when I opened the page and started to answer this question, I left it alone to watch the end of the WorldCup football game, and when I resumed I did not refresh the page, thus did not see your answer was already posted.
*Friday, July 2, 2010 at 4:12pm by Reiny*

**THANKS FOR YOUR HELP DAMON AND REINY!! :)**

thanks alot!
*Thursday, May 8, 2008 at 9:31pm by Miley*

**Calculus--Reiny**

Thanks Damon =)
*Sunday, December 25, 2011 at 8:43pm by -Untamed-*

**Algebra**

Thanks Damon and Reiny for your help!
*Thursday, February 20, 2014 at 5:33pm by Kathy*

**Calculus**

Thank You Damon, Reiny and Drwls for your help
*Monday, February 16, 2009 at 7:51pm by Barbara*

**Math grade 9**

Are they supposed to know that Reiny ?
*Friday, December 20, 2013 at 8:02pm by Damon*

**math**

LOL - do it Reiny's way !
*Thursday, February 20, 2014 at 5:15pm by Damon*

**math 115 9.4 #80**

my money is on Damon
*Monday, December 29, 2008 at 3:07pm by Reiny*

**Algebra 1 (Reiny or Kuai)**

Include x = 0 for sure :)
*Saturday, November 30, 2013 at 3:24pm by Damon*

**Algebra 1 (Reiny or Kuai)**

f(x) = 2.00 + .25(x-1)
*Friday, November 8, 2013 at 10:16am by Damon*

**Algebra 1 (Reiny)**

4 * 3^4* 2^8/ (2^9 * 3^5 ) I think you mean it that way 4 /(2*3) 2/3
*Monday, February 3, 2014 at 9:08pm by Damon*

**pre-calc help !!!!!!!**

from Damon's middle section: 2cos^2 x - cosx = 0 cosx(2cosx - 1) = 0 cosx = 0 or cosx = 1/2 so from cosx=1/2 we have the 2 answers that Damon gave from cosx = 0 , we also have x = 90° or x = 270° x = π/2 or x = 3π/2
*Tuesday, November 20, 2012 at 3:21pm by Reiny*

**algebra**

thank you Reiny/Damon sorry for all the trouble
*Saturday, November 22, 2008 at 5:00pm by qwerty*

**Damon**

ain't it scary how we think alike? LOL
*Tuesday, December 2, 2008 at 8:25pm by Reiny*

**Go with Damon's - Calculus please help**

another senior moment for me.
*Tuesday, November 22, 2011 at 9:56am by Reiny*

**To Damon**

Best answer I have seen in a week !!!
*Saturday, April 21, 2012 at 7:58pm by Reiny*

**trigonometry**

Dang - you are correct, Damon. Sorry, Reiny.
*Thursday, October 11, 2012 at 4:24am by Steve*

**Math-Can you help me Damon or Reiny?**

counting all the numbers in A I see n(A) = 90 n(B)=150 total is 200 , P(A) = 90/200 = 9/20 P(B) = 150/200 = 3/4 P(A|B) is a conditional probability and is defined as P(A∩B/P(B) = (40/200) / (3/4) = 4/15 find P(B|A) the same way
*Thursday, July 28, 2011 at 8:01pm by Reiny*

**algebra 1**

x^3 + 3 x^2 - 2 x^2 - 6 x + 2 x^2 + 2 x = 0 No change. Reiny guessed what you meant way back x^3 + 3 x^2 - 4 x = 0 x(x^2 + 3 x - 4 ) = 0 x (x+4)(x-1) = 0 x = 0 x = -4 x = 1
*Monday, March 9, 2009 at 5:18pm by Damon*

**Algebra**

Thanks Damon and Reiny, it helped a lot. Really appreciate it :)
*Sunday, January 31, 2010 at 3:13pm by Vanessa*

**Oh, sorry**

I gave you the amount on the last square. Use Reiny's system.
*Sunday, September 18, 2011 at 8:06pm by Damon*

**Go with Damon - math**

Just have to get stronger glasses.
*Sunday, March 10, 2013 at 8:59am by Reiny*

**Calc and Physics**

Damon and Reiny. Thanks for your quick and thorough responses.
*Sunday, December 16, 2012 at 2:03am by Daryl*

**Algebra-Ms. Sue**

Reiny and I bout replied below
*Monday, March 11, 2013 at 8:31pm by Damon*

**Calculus**

go with Damon I skimmed over the "parabolic section" of your post.
*Sunday, August 22, 2010 at 9:51pm by Reiny*

**Calculus**

I think Damon missed that negative sign This is a catenary and its derivative is y' = (1/2) (e^x - e^-x)
*Sunday, April 14, 2013 at 1:55am by Reiny*

**Math**

Tyler, Reiny answered this for you a few minutes ago. The geometry has not changed.
*Tuesday, February 26, 2008 at 8:23pm by Damon*

**Go with Damon ... Calculas**

sorry, I should really read more carefully,
*Tuesday, October 12, 2010 at 7:17pm by Reiny*

**Steve, Reiny ??**

I did this twice and do not see errors. Did I make some stupid mistake?
*Sunday, March 30, 2014 at 7:29pm by Damon*

**AP Stats**

Damon is right, (time to get new reading glasses at the dollar store)
*Friday, January 2, 2009 at 2:39pm by Reiny*

**Precalculus**

Damon, how would I solve thats what I am confused on Reiny, That answer does not fit with any of the given answers
*Tuesday, August 9, 2011 at 2:01pm by Hanson*

**Algebra 1 (Reiny or Kuai)**

No, because you only pay .25 AFTER you buy the first one for 2
*Friday, November 8, 2013 at 10:16am by Damon*

**oops - Finite Math**

forget my answer, go with Damon I read it as a single deposit.
*Thursday, January 16, 2014 at 5:18pm by Reiny*

**Reiny Or Damon?**

Thanks for reading this! A triangular prism has vertices at A(2,-1,-1) B(2,1,4) C(2,2,-1) D(-1,-1,-1) E(-1,1,4), and F(-1,2,-1)? This question has two parts: 1 - Which image point has the coordinates (-3,2,1) after a translation using the vector <-5,1,3> I'm thinking it'...
*Thursday, April 26, 2012 at 7:57pm by For Reiny*

**Maths - Sets**

In general if you have n elements, then the number of subsets is 2^n , which includes the null set and the complete set. I you look at Damon's first reply you will notice that the numbers he has are the elements of a row in Pascal's triangle. in any row of Pascal's triangle ...
*Sunday, May 4, 2008 at 8:23am by Reiny*

**advanced math**

Then you are all set. The answer Reiny gave you applies. Either z or y or f(x) is fine on the left.
*Monday, March 17, 2008 at 3:14pm by Damon*

**alg 2.**

I do not know what to say. Reiny and I did the parentheses quite different ways and both got the same answer.
*Thursday, May 8, 2008 at 8:32pm by Damon*

**Math**

Please read the above carefully. Both Reiny and Damon gave you the answer.
*Monday, May 19, 2008 at 7:47pm by Ms. Sue*

**math help plz!**

Damon, didn't see that you already did this question. Well, at least we agree down to the last penny, lol
*Wednesday, April 21, 2010 at 10:13pm by Reiny*

**MATH 12**

Use what Reiny wrote. I ignored the changes in probability as the bag contained fewer balls.
*Tuesday, August 5, 2008 at 8:38pm by Damon*

**math**

Thank you very much Reiny and also Damon. This is the first time I felt embarrassed helping my son. Sign of things to come of course. As Reiny suggested, we ended up plotting and then selecting less than half a dozen candidates. I also cheated and made a spreadsheet just to ...
*Sunday, January 27, 2013 at 5:20pm by sally*

**Algebra**

Damon's answer is correct. Just looked at mine and I forgot the 6 in front of the x^2 term second last line should have been = (7x)^2 - (6x^2 - 20)^2 , ahhh, a difference of squares = (7x + 6x^2 - 20)(7x - 6x^2 + 20) = (3x-4)(2x+5)(5-2x)(4+3x) the same answer as Damon
*Monday, April 19, 2010 at 8:56pm by Reiny*

**solid mensuration**

wow!!! thnk you so much damon and reiny for helping now i knw how to use ratios. tnx a lot:)
*Friday, July 29, 2011 at 9:38pm by acshikari*

**CALC URGENT**

I often found that students were more comfortable and familiar with rotations around the x-axis. Notice we could just switch the x and y variables, and then rotate around the x-axis. All shapes and volumes would be retained. Then volume = 2pi[integral] (4x^2 - x^6)dx from 0 to...
*Thursday, February 5, 2009 at 4:35am by Reiny*

**Damon did this for you - Derviative**

Damon did this for you yesterday http://www.jiskha.com/display.cgi?id=1288682588 Please check your previous posts before posting the same question again.
*Wednesday, November 3, 2010 at 1:48am by Reiny*

**Thanks Damon & gr**

Thanks to both of you for correcting my blatant typing error. Perhaps I shouldn't attempt to answer questions at 1:30 A.M. anymore, lol
*Tuesday, December 16, 2008 at 1:19am by Reiny*

**Thank you:):):)**

Thank you now I understand how to check them to see if there right. Thanks Damon, and thanks Reiny.
*Sunday, April 5, 2009 at 4:44pm by Rae Rae*

**transformation**

Damon, I think she wanted to rotate counter-clockwise, you went clockwise
*Monday, February 23, 2009 at 5:15pm by Reiny*

**College Algebra**

Reiny thank you because I didn't answer Damon's I knew it had to have something to do with 25 being 1/4 of 100 but your explanation of thinking of it as * 1/4 made sense to me so thank you
*Friday, December 21, 2012 at 2:34pm by Linda*

**Calculus Help**

That's what I get. It seems we agree. Is there a chance the answer key is in error? Maybe Reiny or Damon can see an error.
*Friday, April 4, 2014 at 10:52pm by Steve*

**Reiny+Damon**

Can you reply to my last math+log post =) thanks. I'm going to be having alot of math questions today.
*Monday, February 23, 2009 at 5:24pm by Chopsticks*

**Geomotry**

Just noticed that Damon had given you the formula for finding the midpoint. xm = (-9+5)/2 = -2 ym = (3+7)/2 = 5 so the midpoint is (-2,5)
*Thursday, January 12, 2012 at 7:18pm by Reiny*

**Calculus**

Damon I respectfully disagree Your parabola opens sideways I think you meant to say: y-1 = a(x-6)^2 then at (0,-35) -36 = a(36) a = -1 so y-1 = -(x-6)^2 y = -(x-6)^2 + 1
*Thursday, October 16, 2008 at 6:47pm by Reiny*

**Calculus (Optimization)**

Reading the question again, I think that I took the wrong interpretation and Damon took the right one.
*Friday, December 16, 2011 at 6:23pm by Reiny*

**pre-calculus**

If the equation is as you typed my money is riding with Damon. Your answers don't even come close to satisfying the equation.
*Tuesday, February 5, 2013 at 8:48pm by Reiny*

**Sorry - Pre-cal**

sorry, not in my area of expertise. Perhaps drwls, Damon, bobpursley or DrBob or others can help out here.
*Saturday, January 3, 2009 at 12:09pm by Reiny*

**Math**

Did you mean 2(x^2)y 12 + 12xy + 18y ? If so, then = 2y(x^2 + 6x + 9) = 2y(x+3)^2 If you meant it the way you typed it, then use Damon's solution.
*Monday, January 10, 2011 at 9:05am by Reiny*

**Math**

If the question is g(x) = 1/(x-3) + 1 then the vertical asymptote is x = 3 and the horizontal is y = 1 (I believe Damon asked you yesterday for a clarification about the confusing denominator, but today you typed it exactly the same way.)
*Saturday, March 27, 2010 at 7:03pm by Reiny*

**Analytic Geometry**

I see that you have already looked at the solutions to a very similar problem below. Follow the recipes laid out by Reiny and Steve and you should get it.
*Monday, January 28, 2013 at 3:26am by Damon*

**Algebra II**

Damon, since x ≤ -3 is already a subset of x < -1/2, graphing x < -1/2 the way you just described it would suffice.
*Saturday, January 5, 2008 at 5:54pm by Reiny*

**Algebra 1 (Reiny)**

y^10 / y^1 = y^10 y^-1 = y^9
*Monday, February 3, 2014 at 10:12pm by Damon*

**More Rational Exponents! - Is Anyone there? Ms. Sue? Damon? Steve? Reiny?**

Is anyone there? I'm still here, and will be until it gets answered. I will still appreciate it if you guys can answer these.
*Friday, February 14, 2014 at 8:22pm by Brady*

**algebra 4**

or the equation was given as p = 100(.99997)^t for t = 20000, my calculator gave me p = 54.88 g As Damon pointed out, your equation as it stands makes little sense.
*Wednesday, February 18, 2009 at 7:55pm by Reiny*

**Reiny! Reiny! Reiny!**

Wait, I don't get it. I solved 3t = 6 (1/4 - t) and got 11.66666666666.... and then what do I do? ..or did I do that wrong?
*Thursday, February 5, 2009 at 12:12am by Joy*

**math**

first denominator = (x-2)(x+2) second denominator = (x-2)(x-2) note Reiny typo third denominator = (x-3)(x+2) so Least common denominator = (x-2)(x-2)(x+2)(x-3)
*Wednesday, November 28, 2012 at 10:00pm by Damon*

**transformation**

Damon, I apologize You went the correct way, I messed up and went the wrong way.
*Monday, February 23, 2009 at 5:15pm by Reiny*

**Reiny! Reiny! Reiny! Answer Check and HW Help!**

What are the equations for numbers 3 and 4?
*Thursday, February 12, 2009 at 11:36pm by Britney*

**calculus5**

Damon and I have done some of them for you. Now you try some of the others. Post your solution so we can see where your difficulty is. These are rather straightforward questions, and you should not expect us just to do the work for you.
*Sunday, November 28, 2010 at 10:19am by Reiny*

**Math+Log**

it is x look at Damon's last two lines: " loga (a^x) = x loga(a) but loga(a) = 1 " so wouldn't loga (a^x) = x(1) = x ?
*Monday, February 23, 2009 at 4:56pm by Reiny*

**Precalculus**

Oh, I see Reiny got the same answer. If you typed it right the answer is right.
*Tuesday, January 5, 2010 at 9:58pm by Damon*

**math**

lou, your answer of -(x-5)(x+5) is the same as the answer of (5-x)(5+x) that Damon and anonymous gave you if you want to factor out the -1 at the start, you can do that 25 - x^2 = -(x^2 - 25) = -(x+5)(x-5) really makes no difference
*Sunday, June 12, 2011 at 4:46pm by Reiny*

**Math**

Damon had 10^1281 so I guess you wanted 1.0 x 10^1281
*Sunday, March 11, 2012 at 10:02pm by Reiny*

**trust me...**

anonymous, dont trust damon on this one i answered what u and damon said and i get them wrong, trust me... SO SORRY DAMON:( I DONT MEAN IT PERSONALLY i took this and i put down the same answers and got them wrong, thats all
*Thursday, March 13, 2014 at 11:18am by TTR+S<3 *

**math**

looked at another way: How many numbers can be formed with no 9 single digit: 8 2 digits: 8*9 = 72 total with no 9's = 80 so the numbers that do have a 9 is 99-80 = 19, like Damon had above.
*Wednesday, February 20, 2008 at 8:17pm by Reiny*

**random**

you're pretty good at history and literature as well... i'm not sure about Reiny, and bobpursley, and damon..and GuruBlue i've noticed bobpursley answer many different type of questions; science, lit, history, ..
*Sunday, February 22, 2009 at 10:16pm by Bella*

**calculus**

Thanks Damon. And to Bob and Reiny, I was not asking for answers at all, I assumed that when someone looked at the question they would explain how to do it, not give me the answer. Considering I have all the answers in the back of my book. But thanks.
*Tuesday, March 17, 2009 at 11:36am by mkcolema*

**to Damon**

Looking at the little box that holds my paper clips I got 4 and 4
*Wednesday, June 6, 2012 at 5:36pm by Damon*

**Math question - Thanks, Damon**

Ooops -- Damon is right. Where's my head???
*Monday, April 22, 2013 at 12:57pm by Ms. Sue*

**S.S (DAMON)**

I have to see what you think first. I will check after lunch.
*Thursday, March 13, 2014 at 12:52pm by Damon*

**Social studies check answers ***damon*****

No. What did Damon tell you to do?
*Thursday, March 13, 2014 at 6:04pm by Ms. Sue*

**Calculus (for damon)**

Have you had any series even in algebra 2 ?
*Sunday, February 17, 2008 at 7:28pm by Damon*

**algebra please help Dr.Bob**

I answered below. Damon
*Tuesday, February 19, 2008 at 9:33pm by Damon*

**damon (: !**

Please no, post here so others can help. I am not often around.
*Monday, June 16, 2008 at 9:18pm by Damon*

**math**

heidi - I did the previous one for you. Now you try. Damon
*Sunday, November 30, 2008 at 8:49pm by Damon*

**grammar damon be clearr**

damon can you be more clear please.
*Sunday, June 14, 2009 at 7:05pm by alley*

**Physics Help - Use Damon's Answer**

Go with Damon - I switched the a and the t.
*Tuesday, January 28, 2014 at 12:54am by Steve*

**Social studies check answers ***damon*****

1. I have no idea. 4. A) yes 5. B) yes 6. C) yes 8. C) yes
*Wednesday, March 26, 2014 at 11:06am by Damon*

**alg 2.**

Well, I think log4 (1/5) I got -1 log4 5 she got -2 log4 5 one of us subtracted wrong or something However Reiny and I agree exactly, so the odds are in our favor :
*Thursday, May 8, 2008 at 8:32pm by Damon*

**algebra- help needed fast**

from Damon's x^2 = 7 next line: x = ± √7 subbing that into the first 49 + y^2 = 49 y = 0 you have an ellipse intersecting a hyperbola. They meet at (√7,0) and (-√7,0)
*Thursday, February 26, 2009 at 7:31am by Reiny*

**What is wrong with my answer?**

SraJMcGin, Do you see something incorrect about my reply? Damon
*Friday, February 11, 2011 at 3:38pm by Damon*

**U.S History**

i get it thank u damon. for some reason you remind me of matt damon if u no him hes an actor thanks 4 the help :)
*Monday, December 12, 2011 at 6:13pm by Jackson*

**S.S (DAMON)**

I think the rest are ok but Costa Rica has by far the most stable democracy.
*Thursday, March 13, 2014 at 1:38pm by Damon*

**Physics - Damon**

that sin theta = .1 is a typo Yes, I got 2.87 degrees in the line above
*Wednesday, January 28, 2009 at 7:05pm by Damon*

Pages: **1** | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | Next>>