Week+of+02-22-10

Section 1: Thought Question of the Week

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The sum of the digits of a two-digit number is 9. When the digits are reversed, the number is increased by 45. Find the number.  YOU MUST USE SYSTEMS TO SOLVE. ======

Name: Jacob Scott  Date: 3/1/10 Type of posting: 2 Hey guys. On the homework tonight I'm stuck on number 9. The question is (5lp^-2g)-1 over 10lp9g4. The answer I got was 2p^11g3 over 1. Is that right? Thanks Jeff Schecter  Date: 3/1/10  Type of posting: 1  Positng: x+y= 9 y= -18+45  y= x+45 y= 27  x+x+45= 9  2x+ 45= 9  2x= -36  x= -18  The number is 27. 2+7 is equal to 9. 27 is reversed to 72. 27 plus 45 is equal to 72. The number is 27.

<span style="font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;">**<span style="font-family: Tahoma,Geneva,sans-serif;">Name: ** <span style="font-family: Tahoma,Geneva,sans-serif;"> Max Mongiello <span style="font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;">**<span style="font-family: Tahoma,Geneva,sans-serif;">Date: ** <span style="font-family: Tahoma,Geneva,sans-serif;"> 3/1/10 <span style="font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;">**<span style="font-family: Tahoma,Geneva,sans-serif;">Type of posting: ** <span style="font-family: Tahoma,Geneva,sans-serif;"> 1 <span style="font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;">**<span style="font-family: Tahoma,Geneva,sans-serif;">Posting: ** <span style="font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;">**<span style="font-family: Tahoma,Geneva,sans-serif;"> x + y = 9 ** <span style="font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;">**<span style="font-family: Tahoma,Geneva,sans-serif;"> y = -18 + 45 **

<span style="font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;"> **<span style="font-family: Tahoma,Geneva,sans-serif; font-size: 14px; line-height: 21px;">y= x+45 y= 27 ** <span style="font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;">**<span style="font-family: Tahoma,Geneva,sans-serif; font-size: 14px; line-height: 21px;"> x+x+45= 9 ** <span style="font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;">**<span style="font-family: Tahoma,Geneva,sans-serif; font-size: 14px; line-height: 21px;"> 2x+ 45= 9 ** <span style="font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;">**<span style="font-family: Tahoma,Geneva,sans-serif; font-size: 14px; line-height: 21px;"> 2x= -36 ** <span style="font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;">**<span style="font-family: Tahoma,Geneva,sans-serif; font-size: 14px; line-height: 21px;"> x= -18 ** <span style="font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;">**<span style="font-family: Tahoma,Geneva,sans-serif; font-size: 14px; line-height: 21px;"> Two plus seven equals nine, ** <span style="font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;">**<span style="font-family: Tahoma,Geneva,sans-serif; font-size: 14px; line-height: 21px;"> when you reverse 27 it is 72. 27 plus 54 ** <span style="font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;">**<span style="font-family: Tahoma,Geneva,sans-serif; font-size: 14px; line-height: 21px;"> equals 72, making the number 27. **

=<span style="color: #9600ff; font-family: 'Lucida Console',Monaco,monospace;">Name:Jared Mactas = =<span style="color: #9600ff; font-family: 'Lucida Console',Monaco,monospace;">Date:3/1/10 = =<span style="color: #9600ff; font-family: 'Lucida Console',Monaco,monospace;">Type of Posting:1 = =<span style="color: #9600ff; font-family: 'Lucida Console',Monaco,monospace;">Posting: x +y = 9= =<span style="color: #9600ff; font-family: 'Lucida Console',Monaco,monospace;">y = -18 + 45 = =<span style="color: #9600ff; font-family: 'Lucida Console',Monaco,monospace; font-size: 110%;">y = x+45 y= 27= =<span style="color: #9600ff; font-family: 'Lucida Console',Monaco,monospace;">x+x+45 = 9= =<span style="color: #9600ff; font-family: 'Lucida Console',Monaco,monospace;">2x+ 45 = 9= =<span style="color: #9600ff; font-family: 'Lucida Console',Monaco,monospace;">2x = -36= =<span style="color: #9600ff; font-family: 'Lucida Console',Monaco,monospace;">x = -18= y= 27 and 2+7=9 and when you flip the numbers around it is 72 which still equals 9

<span style="color: #b600ff; font-family: 'Comic Sans MS',cursive; font-size: 17px;">Sections 2 and 3: Questions on Homework <span style="color: #1cff00; font-family: 'Comic Sans MS',cursive; font-size: 14px;">// Please post any responses to homework questions right below the posting that you are answering. //

<span style="color: #2be92b; font-family: 'Comic Sans MS',cursive;"> ** Name: ** Jordan Abend <span style="color: #0036ff; font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;"> **Date:** 2/22/10 <span style="color: #2be92b; font-family: 'Comic Sans MS',cursive;"> ** Type of posting: ** 2 <span style="color: #2be92b; font-family: 'Comic Sans MS',cursive;"> ** Posting: ** Hello everybody. How are you doing on this wonderful day. I am having trouble with question 21 on the homework. The question is (ab^4)(ab^2). I noticed it was in parentheses, so I put a and b as the bases. Due to the product rule for exponents, I added the exponents and kept the base. After doing all that thinking, I came to the conclusion the answer is ab^6. Is that right? I am having trouble with exponents and don't feel confident in my work. If someone could reply to my question as quickly as possible it would be much appreciated. I need to know if I'm going in the right direction. Thanks.

<span style="color: #ff00ad; font-family: 'Lucida Console',Monaco,monospace; font-size: 16px; line-height: 23px;"> Name: Paige Alenick <span style="color: #ff00ad; font-family: 'Lucida Console',Monaco,monospace; font-size: 16px; line-height: 23px;"> Date:2/22/10 <span style="color: #ff00ad; font-family: 'Lucida Console',Monaco,monospace; font-size: 16px; line-height: 23px;"> Type of Posting: 3 (response to Jordan's question <span style="color: #ff00ad; font-family: 'Lucida Console',Monaco,monospace;">) ====<span style="color: #7229e0; font-family: 'Comic Sans MS',cursive;">**Hi Guys. Jordan, sorry if this is really delayed but it wasn't until just now i could access the site. To answer your question you are not right. Because the exponent is //INSIDE// the parenthesis it applies only to what is //DIRECTLY// next to it. Therefore, the base is just 'b'. The answer that i got for that problem would be a^2+b^6. If you disagree with this answer please let me know. Thanks.** ==== **Name: Jon Libock** **Date:** 2/23/10 **Type of posting:** 2 **Posting: Hey guys I don’t know how to do the problems on the homework so can someone just give me the steps on how to do #14, 16, and 18.**

<span style="color: #ff0000; font-family: Impact,Charcoal,sans-serif; font-size: 16px;"> Name: **Deniz Piatt** <span style="color: #ff0000; font-family: Impact,Charcoal,sans-serif; font-size: 16px;"> Date: **<span style="color: #ff0000; font-family: Impact,Charcoal,sans-serif; font-size: 16px;"> 2/23/10 ** <span style="color: #ff0000; font-family: Impact,Charcoal,sans-serif; font-size: 16px;">Type of posting: **<span style="color: #ff0000; font-family: Impact,Charcoal,sans-serif; font-size: 16px;"> 2 ** Posting: What's going on guys? I got a question on number 16 on page 441. In the first set of parenthesis, it says "x + 5". I'm 100% stumped on this. I am not sure how I can solve it. No hunches, and nothing that I can think of makes sense as an answer. If anyone can help, I appreciate it! Have a great day!

**Name: Kennedy Clifford** **Date: 2/24/10** **Type of posting: 2** **Hey everyone. On the homework tonight I am stuck on number 23. The problem is** ** (J^-1K^3) ^-4 OVER J^3K^3. First I distributed the -4 and got J^4K^-12 OVER J^3K^3. Since there is a negative exponent ( K^-12 ) in the numerator I am pretty sure I need to move it to the denominator and change it to a positive. When I do that I get J^4 OVER J^3K^3K^12. Since there are two K’s in the denominator ( K^3 and K^12 ), do I add their exponents together? Or do I multiply them to get an answer of J OVER K^36 ?**

<span style="font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;">**<span style="font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;">Name: ** Katie Brinskele <span style="font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;"> **<span style="font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;">Date: ** 2/24/10 <span style="font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;"> **<span style="font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;">Type of posting: ** 3 (response to Kennedy) <span style="font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;"> **<span style="font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;">Posting: **Hey Kennedy. At the end of you're problem you are going to ADD the exponents together to get an answer of <span style="color: #ff0000; font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;">J OVER K^15. <span style="color: #000000; font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;">You multiply the exponents when it is a problem like this: (x^3)^4. I hope that helped.

<span style="color: #000000; font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;"> Name: Lerna Girgin <span style="color: #000000; font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;"> Date: 2/24/10 <span style="color: #000000; font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;"> Type of posting: 2 <span style="color: #000000; font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;"> Posting: I am having trouble solving number 25 on tonight's homework practice 8-2. I have dealt with similar problems where there is an exponent outside of the parenthesis, but not when it is negative. My first approach was to multiply everything by -5. So it would be: <span style="color: #ff0000; font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;">(q-1) -5 (r3)-5 over g-5 (r-2) -5. Then my step was to flip everything and get g5r10 over q5r-15 then to get rid of the negative sign I would flip it again and get q5r15 over g5r10, which is my final answer. I am not sure of anything in the problem and would love some feedback.

<span style="color: #000000; font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;">Name: Hella Talas <span style="color: #000000; font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;"> Date: 2/24/10 <span style="color: #000000; font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;"> Type of posting: 3 <span style="color: #000000; font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;"> Posting: Hi ! The first step to simplify that monomial is to simplify 22/11 which = 2. Then you would need to subtract the exponents because you are dividing. r^3-2= r. s^2- -3= s^2+3= s^5. Your answer would then be 2rs^5! Good luck!!!! :)

<span style="color: #00ff00; font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;"> Name: Corey Reiner <span style="color: #00ff00; font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;"> Date: 2/24/10 <span style="color: #00ff00; font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;"> type of posting: 2 <span style="color: #00ff00; font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;"> Posting: hey everyone for tonight's homework I am unsure about if i did question 19 correctly. I so far have come to an answer of 1G^8H^2 over 9. what i am not 100% sure about is if i am supposed to do something with 9 or if it is ok the way it is. if some one could help that would be great. Thanks

<span style="color: #ff00ff; font-family: Verdana,Geneva,sans-serif;">Name: Amanda Patalano <span style="color: #ff00ff; font-family: Verdana,Geneva,sans-serif;"> Date: 3/1/10 <span style="color: #ff00ff; font-family: Verdana,Geneva,sans-serif;"> Type of posting: 2 <span style="color: #ff00ff; font-family: Verdana,Geneva,sans-serif;"> Posting: Hey everyone, i really had trouble with number 5 of the practice sheet handed out today in class. <span style="color: #ff0000; font-family: Verdana,Geneva,sans-serif;">The problem is (2x^-2 y^3 z^-3)^-1. <span style="color: #ff00ff; font-family: Verdana,Geneva,sans-serif;"> __**i soon get:**__ <span style="color: #ff0000; font-family: Verdana,Geneva,sans-serif;">1 <span style="color: #ff0000; font-family: Verdana,Geneva,sans-serif;"> ---. <span style="color: #ff0000; font-family: Verdana,Geneva,sans-serif;"> 2x^-2 y^3 z^-3 <span style="color: #ff00ff; font-family: Verdana,Geneva,sans-serif;"> I know that the exponent is negative but i am having trouble making it positive. if anyone could help me solve this problem that would be great. Thanks

<span style="color: #065a8e; font-family: Tahoma,Geneva,sans-serif;">Name: Will Calderone <span style="color: #065a8e; font-family: Tahoma,Geneva,sans-serif;"> Date: 3/1/10 <span style="color: #065a8e; font-family: Tahoma,Geneva,sans-serif;"> Type of Posting: 2 <span style="color: #065a8e; font-family: Tahoma,Geneva,sans-serif;"> Posting: Hello everyone. For Number 9 on the practice sheet we did in class today i got a positive 25 in the numerator, and i don't know if it is right. is someone could explain to me why it is negative or positive that would be great.

<span style="color: #065a8e; font-family: Tahoma,Geneva,sans-serif;"> Name: Matt McGee <span style="color: #065a8e; font-family: Tahoma,Geneva,sans-serif;"> Date: 3/1/10 <span style="color: #065a8e; font-family: Tahoma,Geneva,sans-serif;"> Type of Posting: 2 <span style="color: #065a8e; font-family: Tahoma,Geneva,sans-serif;"> Posting : hello everyone. for number 4 on the practice sheet we received in class today. i got m over n to the sixth power. i think it is correct, but i am not sure if it would be mn to the sixth power. If anyone could help it would be great.

<span style="color: #00ffff; font-family: 'Courier New',Courier,monospace; font-size: 14pt;">**Name: Hailey Personette** <span style="color: #00ffff; font-family: 'Courier New',Courier,monospace; font-size: 14pt;"> **Date:** 3/1/10 <span style="color: #00ffff; font-family: 'Courier New',Courier,monospace; font-size: 14pt;"> **Type of posting:** 2 <span style="color: #00ffff; font-family: 'Courier New',Courier,monospace; font-size: 14pt;"> **Posting: Hey fellow classmates; I don’t know how to do the problem number 20. and 24. on the Practice work sheet. Can someone just give me the steps.**

Name: Remzi Tonuzi Date: 3/1/10 Type of Posting: 3 Posting: Hi Matt. For number 4, your answer is correct. It says b0n-2m-8 over n4m-9. The answer I got was m over n6(to the 6th power). Since there are more n's on the denominator, the n's on the numerator would be transferred to the denominator. It is a negative so it changes to a positive and is then added to the n4 (to the fourth) equaling n6 (n to the 6th). Hope that helped.

Name: Drew Mann Date: 3/1/10 Type of posting: 2 Posting: When there are brackets and parenthesis in the problem do you work from the outside in or the inside out. Also if there is a b squared in the numerator and a b to the -2, Would that become b to the 4th in the numerator or b5 would it cancel out because you didn't switch it to the top

<span style="color: #000000; font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;"> **Name:** Juliet Altmann <span style="color: #000000; font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;"> **Date:** 3/1/10 <span style="color: #000000; font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;"> **Type of posting:** 2 <span style="color: #000000; font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;"> **Posting:** Hey guys, I'm have some trouble with the Simplifying Monomials Practice Review for the quiz tomorrow. For number 4, I don't understand why it where the n6 in the denominator of the answer comes from. I keep getting confused with problems like this. Can someone please clear this up for me? Thanks!

<span style="color: #2be92b; font-family: 'Comic Sans MS',cursive; font-size: 13px; line-height: 19px;"> ** Name: ** Brian Horn <span style="color: #0036ff; font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;"> **Date:** 3/1/10 <span style="color: #2be92b; font-family: 'Comic Sans MS',cursive; font-size: 13px; line-height: 19px;"> ** Type of posting: ** 2 <span style="color: #2be92b; font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;"> ** Posting: Hey guys, I hope everyone is having a good day!! I know I am. So, I was looking at the packet we received last week on monomials for tomorrows quiz and I came across the concept of power for a power. It is difficult for me to comprehend the concept. If anyone can clarify it for me it would be much appreciated. Thanks!! **

<span style="color: #2be92b; font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;"> Name: **Nick Rizzo** <span style="color: #000000; font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;"><span style="color: #ff5900; font-family: 'Comic Sans MS',cursive; font-size: 13px; line-height: 19px;"> Date: **<span style="color: #ff5900; font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;"> 2/28/10 ** <span style="color: #800080; font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;"> Type of posting: **<span style="color: #800080; font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;"> 2 ** <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">**<span style="color: #0000ff; font-family: 'Comic Sans MS',cursive; font-size: 120%;">Posting: Hey guys what's up :) and to answer Mr. Horn's question today is such a good day! i am just reviewing for tomorrows quiz and i came across a problem (a/b)-6. How would I solve this? Would I "distribute" the negative and then flip the variables? I got b/a. Is that correct? Thank you guys for your time and effort :) **

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">**<span style="color: #0000ff; font-family: 'Comic Sans MS',cursive; font-size: 120%;"> Name: Sammy Rosen ** <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">**<span style="color: #0000ff; font-family: 'Comic Sans MS',cursive; font-size: 120%;"> Date: 3/1/10 ** <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">**<span style="color: #0000ff; font-family: 'Comic Sans MS',cursive; font-size: 120%;"> Type of posting: 2 ** <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">**<span style="color: #0000ff; font-family: 'Comic Sans MS',cursive; font-size: 120%;"> Posting: Hey guys i was doing tonight's homework and i am on number 8. It is a parenthesis inside of a parenthesis kind of equation. With these types i always get confused if i am just supposed to add the exponents in the parenthesis or multiply! **

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;"> **<span style="color: #0000ff; font-family: 'Comic Sans MS',cursive; font-size: 120%;">Name: Jake Waldron ** <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">**<span style="color: #0000ff; font-family: 'Comic Sans MS',cursive; font-size: 120%;"> Date: 3/2/10 ** <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">**<span style="color: #0000ff; font-family: 'Comic Sans MS',cursive; font-size: 120%;"> Type of posting: 2 ** <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;"> **<span style="color: #0000ff; font-family: 'Comic Sans MS',cursive; font-size: 120%;">Posting: Hey what you are supposed to do is multiply the exponents together from the inside out. And when you multiply you basically just add the exponents together. **

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;"> **<span style="color: #0000ff; font-family: 'Comic Sans MS',cursive; font-size: 120%;">Name: Jon Jun ** <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">**<span style="color: #0000ff; font-family: 'Comic Sans MS',cursive; font-size: 120%;"> Date: 3/2/10 ** <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">**<span style="color: #0000ff; font-family: 'Comic Sans MS',cursive; font-size: 120%;"> Type of posting: 2 **

__Posting: For the sheet, Simplifying Monomials Practice. I need help with number 8, do i need to do the exponents two and then three?__
<span style="color: #0000ff; font-family: 'Comic Sans MS',cursive; font-size: 120%;"> Name:Marisa Moschella <span style="color: #0000ff; font-family: 'Comic Sans MS',cursive; font-size: 120%;"> Date: 3/2/10 <span style="color: #0000ff; font-family: 'Comic Sans MS',cursive; font-size: 120%;"> Type of posting: 2