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Math Forum / Mathematics / Algebra Help / July 2009Math word problem
I'd like to know the proper way to set up the equation for this math word problem: "How many minutes is it before 12 noon if nine minutes ago it was twice as many minutes past 10 am?" Now I figured out the answer of 34 by sampling various numbers for the BN (before noon) value and then adding 9, then doubling it to see if I get the same time. But I'd like to know how to set up which should be a very simple equation so that I may easily solve problems of this nature when they are more complex. Thank you for any assistance! On Thu, 25 Jun 2009 19:29:06 -0500, Mind Warrior <perez_dontlikespam_@mts.net> wrote in <news:tDU0m.115207$9Z.104240@newsfe08.iad> in alt.algebra.help: > I'd like to know the proper way to set up the equation for > this math word problem: > "How many minutes is it before 12 noon if nine minutes ago > it was twice as many minutes past 10 am?" > Now I figured out the answer of 34 by sampling various > numbers for the BN (before noon) value and then adding > 9, then doubling it to see if I get the same time. You've misunderstood the question. If it's now 34 minutes before noon, then nine minutes ago it was 43 minutes before noon and therefore 77 minutes after 10 a.m., but 77 is not twice 34. The correct answer is 37 minutes before noon, so that nine minutes ago it was 46 minutes before noon and 74 minutes after 10 a.m.: 74 = 2 * 37. > But I'd like to know how to set up which should be a very > simple equation so that I may easily solve problems of > this nature when they are more complex. Let x be the present number of minutes before noon; nine minutes ago it was x + 9 minutes before noon and 2x minutes past 10 a.m. There are altogether 120 minutes between 10 a.m. and noon, so (x + 9) + 2x = 120. Simplify: 3x + 9 = 120, 3x - 111, x = 37. Brian >On Thu, 25 Jun 2009 19:29:06 -0500, Mind Warrior ><perez_dontlikespam_@mts.net> wrote in [quoted text clipped - 29 lines] > >Brian Now we are up to at least three different newsgroups in which answers have appeared. --Lynn http://math.asu.edu/~kurtz >>On Thu, 25 Jun 2009 19:29:06 -0500, Mind Warrior >><perez_dontlikespam_@mts.net> wrote in [quoted text clipped - 34 lines] > > --Lynn Lynn, you're not the arbitor of the usenet. Stop wasting bandwidth with your pathetic spam postings whining about cross posting. I'll cross post as often as I like. [...] >> Now we are up to at least three different newsgroups in >> which answers have appeared. > Lynn, you're not the arbitor of the usenet. Stop wasting > bandwidth with your pathetic spam postings whining about > cross posting. I'll cross post as often as I like. You didn't cross-post: you multi-posted. Cross-posting is generally preferred, for the reasons given at <http://oakroadsystems.com/genl/unice.htm#xpost> and <http://web.archive.org/web/20070626185213/http://smjg.port5.com/faqs/usenet/xpos t.html>, among many other places. Brian > [...] > [quoted text clipped - 12 lines] > > Brian Listen up, Brian.....if I want to post the same post in different usenet groups that are topically related to my post, that's my business. I will continue to do so as often as I please and in as many different usenet groups as I please. If that makes you feel like crying, you are free to stock up on tissue paper. > > [...] > > [quoted text clipped - 19 lines] > groups as I please. If that makes you feel like crying, you are free to > stock up on tissue paper. The point is that you can post to more than one different usenet group with a single posting by listing tose newsgroups, separated by commas, in the "Newsgroup:" heading, just above the "Subject:". The process is called cross-posting and is quite common and accepted. To post the same content several times but to a different but single newsgroup each time is called multi-posting, and is, at best, a singularly inefficient process.  SignatureVirgil >> > [...] >> > [quoted text clipped - 29 lines] > newsgroup each time is called multi-posting, and is, at best, a > singularly inefficient process. No, the REAL POINT, and what you need to get into your pinhead, is.....I DON'T CARE!! I will multipost, crosspost, crossdress while posting, and wear a cross while posting to as many groups, and as frequently as I care to. You people are making a lot of wasted spam postings here needlessly. It was an innocent matter of me posting in three math forums. The next time I'll look for 20 forums to post in. I'm sure you'll need to up the dosage of your medication when I do. Obviously you idiots have nothing better to do. A bunch of unemployed math geeks with no social life and no career prospects. > >> > [...] > >> > [quoted text clipped - 34 lines] > DON'T CARE!! I will multipost, crosspost, crossdress while posting, and wear > a cross while posting to as many groups, and as frequently as I care to. You are quite free to tread your own primrose path, but we are equally free to point out (1) that you are doing so, and (2) that there are shortcuts that you are not taking advantage of. SignatureVirgil >> >> > [...] >> >> > [quoted text clipped - 42 lines] > free to point out (1) that you are doing so, and (2) that there are > shortcuts that you are not taking advantage of. Virgil, if your IQ was greater than your waist size, you would have realized that this has nothing at all to do with taking advantage of shortcuts. I'll recap the chronology for you, taking care to use small and simple words for you benefit. 1) I posted a math question (and also on 2.....yes, only 2, other math related forums as well) 2) A busybody idiot named kurtz makes a useless spam post whining about the fact that this question was posted in 2 other math groups (3 in total). 3) I reply to the busybody idiot named kurtz indicating that he/she/it was out of line and that I will cross post (yes cross post, not multipost) as often as I want. 4) A simpleton named scott misunderstands everything (as low IQ cretins tend to do) and mangles this into (and mistakenly so) an issue about cross posting vs multiposting, when even a 6 year old should be able to realize that cross posting is cross posting regardless of whether or not it's done the easiest way (by putting multiple group names in the usegroups field, or doing it manually as I did because I wasn't aware of the other groups at the time I made my original post. 5) A probable fetal-alcohol effects case imbecile named virgil, who apparently has trouble reading and comprehending simple English, mistakenly thinks this is an argument about the most efficient way to cross post when it's really just about someone putting a busybody whiner (kurtz) in their place for wasting bandwidth about cross posting. kurtz was NOT whining about the fact that I didn't cross post in the most efficient way, you mindless eunuch, he/she/it was whining about the fact that this same post appeared in 2 other forums. If you had the reading comprehension skills of an elementary school student or better, it would have been OBVIOUS to you. Additionally, the idiot named kurtz also made pointless whining posts in those other 2 forums as well, which prompted me to make my initial reply here. >> [...] >>>> Now we are up to at least three different newsgroups in >>>> which answers have appeared. >>> Lynn, you're not the arbitor of the usenet. Stop wasting >>> bandwidth with your pathetic spam postings whining about >>> cross posting. I'll cross post as often as I like. >> You didn't cross-post: you multi-posted. Cross-posting is >> generally preferred, for the reasons given at >> <http://oakroadsystems.com/genl/unice.htm#xpost> and >> <http://web.archive.org/web/20070626185213/http://smjg.port5.com/faqs/usenet/xpos t.html>, >> among many other places. > Listen up, Brian.....if I want to post the same post in > different usenet groups that are topically related to my > post, that's my business. Do you always read so carelessly? I didn't say that it wasn't, or that you shouldn't: I merely drew your attention to the distinction between cross-posting, which within reasonable limits is considered perfectly acceptable, and multi-posting, which is not. If, as seems likely, you didn't understand the distinction, you should have resorted to one of the links that I supplied. [...] >>> [...] > [quoted text clipped - 24 lines] > > [...] No Brian, YOU ARE THE IDIOT WHO IS NOT CAPABLE OF READING AND COMPREHENDING ENGLISH!! Read over the following words very SLOWLY until this concept penetrates that thick skull and into your tiny brain...... I DO NOT CARE!!!!! I will multipost, crosspost, crossdress while posting, and wear a cross while posting to as many groups, and as frequently as I care to. Get your daddy to explain to you what a girl looks like and try talking to one for once in your pathetic little existence!! >>>> [...] >>>>>> Now we are up to at least three different newsgroups in >>>>>> which answers have appeared. >>>>> Lynn, you're not the arbitor of the usenet. Stop wasting >>>>> bandwidth with your pathetic spam postings whining about >>>>> cross posting. I'll cross post as often as I like. >>>> You didn't cross-post: you multi-posted. Cross-posting is >>>> generally preferred, for the reasons given at >>>> <http://oakroadsystems.com/genl/unice.htm#xpost> and >>>> <http://web.archive.org/web/20070626185213/http://smjg.port5.com/faqs/usenet/xpos t.html>, >>>> among many other places. >>> Listen up, Brian.....if I want to post the same post in >>> different usenet groups that are topically related to my >>> post, that's my business. >> Do you always read so carelessly? I didn't say that it >> wasn't, or that you shouldn't: I merely drew your attention [quoted text clipped - 3 lines] >> didn't understand the distinction, you should have resorted >> to one of the links that I supplied. > No Brian, YOU ARE THE IDIOT WHO IS NOT CAPABLE OF READING > AND COMPREHENDING ENGLISH!! And yet it's your response that is largely a non sequitur, not mine. You apparently haven't even realized that I don't particularly object to your multi-posting; I merely pointed out why many others do. This information, like my response to your original question, was intended to be helpful. In view of your charming responses, I shall endeavor henceforth to provide no information that might prove helpful. [...] >>>>> [...] > [quoted text clipped - 35 lines] > > [...] Brian, I just PROVED that you're an idiot, and yet you're STILL making posts! You're amazingly pathetic!! I am 100% positive that you've never been on a date with a woman or have any semblance of a social life whatsoever! I DIDN'T MULTIPOST ANYTHING. I CROSS POSTED. Cross posting means posting the same post to more than one group. That is what I did.You're also too incredibly STUPID to realize that this issue isn't even about cross posting vs multi posting. This is about a busybody whining about the fact that this same post was posted to two other groups. You're not even capable of following the logic of the discussion! Sat, 27 Jun 2009 19:21:26 -0500 from Mind Warrior <perez_dontlikespam_@mts.net>: > Cross posting means posting the > same post to more than one group. That's multiposting, which is what you did and which is always wrong. Brian gave you some of the many references to crossposting, but you've already told us you don't care to be educated or to follow accepted conventions. Good luck getting help from people you've been insulting. SignatureStan Brown, Oak Road Systems, Tompkins County, New York, USA http://OakRoadSystems.com Shikata ga nai... Sat, 27 Jun 2009 02:05:32 -0500 from Mind Warrior <perez_dontlikespam_@mts.net>: > Listen up, Brian.....if I want to post the same post in different usenet > groups that are topically related to my post, that's my business. That's really good strategy, pissing off the very same people you ask for help! SignatureStan Brown, Oak Road Systems, Tompkins County, New York, USA http://OakRoadSystems.com Shikata ga nai... > Sat, 27 Jun 2009 02:05:32 -0500 from Mind Warrior > <perez_dontlikespam_@mts.net>: [quoted text clipped - 3 lines] > That's really good strategy, pissing off the very same people you ask > for help! No, Stan, I'm not pissing off the same people I was asking for help. I wasn't asking a worthless idiot who feels the need to whine about crossposting (ala kurtz) or a mindless american lackey who feels the need to stick their nose into a thread that they have no ability to make a purposeful contribution to, as you have done, for any help. Sat, 27 Jun 2009 00:29:28 -0500 from Mind Warrior <perez_dontlikespam_@mts.net>: > Lynn, you're not the arbitor of the usenet. Stop wasting bandwidth with your > pathetic spam postings whining about cross posting. I'll cross post as often > as I like. If you crossposted, you would not have been rebuked. The issue is that you multiposted. SignatureStan Brown, Oak Road Systems, Tompkins County, New York, USA http://OakRoadSystems.com Shikata ga nai... > Sat, 27 Jun 2009 00:29:28 -0500 from Mind Warrior > <perez_dontlikespam_@mts.net>: [quoted text clipped - 6 lines] > If you crossposted, you would not have been rebuked. The issue is > that you multiposted. Stan, you mindless idiot, the issue IS NOT about crossposting vs multiposting. The issue is about kurtz whining about the fact that this post appeared and was answered in two other forums. Consider this: N= Noon T = minutes before N - T - 9 = (N -120) + 2(T+9) N - T - 9 = N - 120 + 2T + 18 -T - 2T = -120 + 27 -3T = -93 T = 31 12:00 - 31 = 11:29 AM 11:29 - 9 = 11:20 AM 10:00AM + 2( 31+ 9) = 11:20AM > I'd like to know the proper way to set up the equation for this math word > problem: [quoted text clipped - 9 lines] > > Thank you for any assistance! |
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