Wow! It's already January 2011!
(Please post to Part 2)
This term I'm teaching Math 65 and Math 95 at PCC as well as Math 111 and Math 243 at Mt Hood. Please post your questions as comments to this post. Include your name, class, and college in the comment or I may not be able to answer your question completely. And remember, although I'm notified about your question almost immediately, please be a little patient and remember I will answer you ASAP!
Barry
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Hi this is Garrett Robinson from MHCC, I'm in your MTH243 class. I'm trying to find your "supplement" online and I can't seem to find it anywhere. Help!
ReplyDeleteLog on to MyMHCC, click on My Courses, then click on Math 243.
ReplyDeleteGo to the Handouts section and click on the Supplement. Follow any instructions to download.
Barry
Hey Barry,
ReplyDeleteIt's Janelle from MTH 65 and I have a ?
I am doing HW #1 and I am on the graphing #11-42 and I am plotting (x,y) both at 0 and the lines are all ending up parallel can u explain this to me
Janelle,
ReplyDeleteI don't have the problem in front of me, but if the lines are truly parallel, that means they don't intersect, so there are no solutions to the system.
Barry
All of them are ending up parallel I checked myself with the solutions book and it looks different to
ReplyDeleteRemember, with y=mx+b, m is the slope and (0,b) is the y-intercept. One thing you can try is graphing the y-intercept, then using the slope (written as an improper fraction) to go from the y-intercept to find a second point.
ReplyDeleteI think in general your issue is correctly graphing the two lines. Another thing to try is to solve a problem in section 5.1 using graphing AND the substitution method.
Jesse Dyer, 243: The supplement packet, I went to go buy one at the book store (I don't own a printer). The book store seems to have no knowledge of your supplement. Well they had me fill out a request form since no one else, to my knowledge, has asked yet about this. I figure I'm alone in wanting to buy it at the store. So I think I'll just run down to kinkos and have it printed out there. I just thought I'd mention it as you'll be getting a request form from the book store. If no one plans on buying it there, no need to waste paper on having it printed out for them.
ReplyDeletesierra cordell,243@ MHCC: On the fist hw assignment pg.12 question 1 letter H. Can you give me a hang with this it reads 102!/95! you hinted to cancel first..what cancels??
ReplyDeleteJesse,
ReplyDeleteThanks for your information. Graphic Services DOES have an order. The two parts of the college just haven't communicated yet. It's my bad. I should have sent in the order before the holidays since both the Bookstore and Graphic Services get very busy between terms.
Sierra,
ReplyDeleteRemember, 105! = 105 x 104 x 103 x ... x 2 x 1.
Also, 95! = 95 x 94 x 93 x ... x 2 x 1.
When you divide these two results, wouldn't you be canceling everything from 95 to 1 in the numerator and the denominator?
Barry
Jesse Dyer, MHCC 243: I'm curious, are you teaching 244 next term at MHCC Barry? If so, will you be using a course supplement for that class as well? I ask as I may come across a good deal on a text book soon.
ReplyDeleteI'm scheduled to teach another section of Math 243 in the Spring. My Summer schedule is not yet set, though often I teach both Math 243 and Math 244. I do not teach statistics at PCC.
ReplyDeleteI do use a supplement in Math 244 as I do in Math 243. As soon as I know more about Summer Term, I will share it with the class.
Ah, a shame. I plan on taking 244 and Linear Algebra in Spring. I won't be taking classes in the Summer.
ReplyDeleteHi this is Jennifer from 111,
ReplyDeleteWhen I go to show my work on a hw problem,
I click on show work and it brings up the
white board. After I show my work on the whiteboard, what do I do?
Not really sure ... anyone out there have an idea?
ReplyDeleteCheck with me in class Tuesday if you don't get anywhere.
Barry
just checking, the homework assignments aren't due until the end of the quarter, right? i'm probably going to need some help with the assignment and was just wondering if i need to stress or not.
ReplyDeleteOn homework assignments:
ReplyDeleteFor Math 243: They are due at the Final as a homework notebook.
For my other math classes: They are due on Wednesday (PCC) or Thursday (MHCC) in class.
I hope that is clear for all.
Barry
hey Barry:)For your 243 class, where do we find the answers to the homework to double check our work, we look all over the packet that we downloaded from the internet, but it is just not there!
ReplyDeleteThanks
Did you look in the Table of Contents in the front?
ReplyDeleteBarry
thanks a lot!
ReplyDeleteMATH 111: MHCC
ReplyDeleteNadya: Hi Barry, I'm not sure about the HW question Section 1.2 Question 18 b) (x,f(x) and (x+h, f(x+h))
This is Melissa from your math 65 class at PCC. I have a question about the activity that we were given on monday. On problem 3 I was able to find the solution for the equations Y=12x+42 and Y=29x through the substitution method. I just can't figure out how to do it through the graphing method. Is the breakeven point where the graphs intersect?
ReplyDeleteHello, Barry this is Erica Stevenson I spoke with the dean and he said that he would send you an email. He said that it would be ok if i am in your class if it's ok with you!
ReplyDeleteMelissa,
ReplyDeleteYes, the breakeven point is the "x-coordinate" of the intersection. However, you do need to round this value up to the nearest whole number, because you cannot sell part of an item.
Barry
Nadya,
ReplyDeleteRemember what the function notation means ... f(x+h) means to use x+h as the input for the function, in this case f(x+h)=2(x+h)+5. Use this to complete the problem. You will have to do some algebra to simplify the result.
Barry
Erica,
ReplyDeleteRead your MyPCC email for some good news.
Barry
Barry,
ReplyDeleteMy name is Leah Alvarez and I am in your MTH 111 course at MHCC. I am having trouble finding the domain and range of a function. An example is f(x) = 8(squared)+6
I know how to graph the function, just get lost from there, help:)
Leah,
ReplyDeleteThe way to look at this is to focus on the x-values of the graph (for the domain) and the y-values of the graph (for the range).
Assuming you meant f(x)=8x^2=6, on your graph you can see that the vertex is the point (0,6) and that it is the lowest point of the graph.
Since the parabola "gets higher" on both sides as it goes towards both positive and negative infinity, the domain (set of all possible x-values) is all real numbers.
On the range, the lowest y-value is 6 (from the point (0,6)) and there is no highest value since the graph increases without bound. So the range is "y greater than or equal to 6".
Barry
Barry,
ReplyDeleteWhen I try to graph on my TI-84 plus calculator, 'ERR:Invalid DIM' comes up, any chance you know how I can fix this?
Thanks!
Leah Alvarez (MTH 111@MHCC)
Leah,
ReplyDeleteGo to your Y= menu. See if one of the plots (Plot 1, etc) on the top is turned on. If it is, it will have light colored letters on a dark background. Use the arrow keys to highlight it, then press ENTER.
Now, try to graph. If it still doesn't graph, show me in class.
Barry
Barry,
ReplyDeleteIt worked! Thanks so much.
See you in class
Leah
Hi Barry!
ReplyDeleteHow would like the written presentation, just the numbers, or everything what we would say on our presentation plus numbers?
This is for stat243:)
Thanks and have a great day!
For Math 243, the written project should be done as before. Check out your syllabus for the details.
ReplyDelete