  Author  Message 

Violet Junior Fantagian
Posts : 99 Join date : 20120909 Age : 18 Location : United States
 Subject: Algebra homework help? Mon Oct 15, 2012 3:40 pm  
 Thank you to everyone who helped me! (Abstract, Makkine, RiceCake, and Spyder) Gonna make another thread whenever I need more help lol, or maybe post here.
Last edited by Violet on Mon Oct 15, 2012 5:22 pm; edited 8 times in total 
   MsJoyMaeda Hero Fantagian
Posts : 5823 Join date : 20101213 Age : 17
 Subject: Re: Algebra homework help? Mon Oct 15, 2012 3:52 pm  
 ......
I wish I could help, but I'm in 7th grade. I'm not that advanced in algebra, even though I have a 96% in math. 
   Abstract Veteran Fantagian
Posts : 4563 Join date : 20100714 Age : 16 Location : (╯°□°)╯︵ ┻━┻ Somewhere flipping tables
 Subject: Re: Algebra homework help? Mon Oct 15, 2012 4:27 pm  
 I pm'd you what you need to do. 
   Makkine Moderator
Posts : 2772 Join date : 20100517 Age : 19 Location : Woah
 Subject: Re: Algebra homework help? Mon Oct 15, 2012 4:35 pm  
 I'm also a ninth grader, but I'm doing Geometry, not Algebra II. I'll help from what I can remember from last year
A. y4x=3
B. 3y3x=9
C. 3x+2y=12
D. 2(x3)+3y=0
Okay, so all you have to do here is identify where the y is, and then use the additive property of equality to turn the equation into y = mx + b format. I'll walk you through the first and last one, but I think you'll understand B and C. A. y4x=3 So, all you have to do is take the x to the other side, right? You do this by cancelling out x. Since 4x is negative, all you have to do is add 4x. But! Whatever you do to one side, you have to do to the other. So add a 4x to 3, too. A. y4x+4x=3+4x A. y=3+4x And there you have it! You can switch around the products, too, to get y=4x3. y=mx+b, see?
D. 2(x3)+3y=0 D is a little tricky because you have to simplify first. So, multiply 2 by everything inside the parentheses. D. 2x6+3y=0 Send the 6 to the other side. D. 2x6+6+3y=0+6 D. 2x+3y=6 Send 2x to the other side D. 2x2x+3y=62x D. 3y=62x BUT WAIT! You need to leave y completely alone, which you can do using the multiplicative property of equality! (the same thing as the additive property, just use division and multiplication) D. 3y/3=6/32x/3 D. y=22/3x Tada!
Last edited by Makkine on Mon Oct 15, 2012 4:42 pm; edited 1 time in total 
   RiceCake Senior Fantagian
Posts : 340 Join date : 20100809 Location : BEHIND U!
 Subject: Re: Algebra homework help? Mon Oct 15, 2012 4:35 pm  
 Im gonna write it step by step: Problem A: 1. y4x=3 2. y4x+4x=3+4x 3. y=3+4x 4. y=4x3 Problem B: 1. 3y3x=9 2. 3y3x+3x=9+3x 3. 3y=9+3x 4. 3y/3=(9+3x)/3 5. y=3+x 6. y=x+3 Problem C: 1. 3x+2y=12 2. 3x3x+2y=123x 3. 2y=123x 4. 2y/2=(123x)/2 5. y=63/2x 6. y=3/2x+6 Problem D: 1. 2(x3)+3y=0 2. 2x6+3y=0 3. 2x2x6+3y=02x 4. 6+3y=2x 5. 6+6+3y=2x+6 6. 3y=2x+6 7. 3y/3=(2x+6)/3 8. y=2/3x+2 I hoped this helps! 
   69hot_wangs69 Dedicated Fantagian
Posts : 1456 Join date : 20110912 Age : 19 Location : Your pants
 Subject: Re: Algebra homework help? Mon Oct 15, 2012 4:37 pm  
 I'm in Algebra 2 Scholars so I know how to do this stuff. What you want to do is isolate y. Just remember that when you move things across the equal sign, the number's sign has to chance. So to do A would look like this:
y4x=3
Add 4x to the other side in y=mx+b format
y=4x+(3)
For B, you would do the exact same thing, except you'd have to divide all the numbers on the left side of the equal's sign by 3. Hope I helped.
And you know how to graph right?
EDIT: Lol, ninja'd
EDIT x2: twice 
   Violet Junior Fantagian
Posts : 99 Join date : 20120909 Age : 18 Location : United States
 Subject: Re: Algebra homework help? Mon Oct 15, 2012 4:48 pm  
 Oh em gee thank you guys! I only need one more thing and I will be done 
   RiceCake Senior Fantagian
Posts : 340 Join date : 20100809 Location : BEHIND U!
 Subject: Re: Algebra homework help? Mon Oct 15, 2012 5:07 pm  
 Question A: (2x² + 3x +5)+(x² + 2x +8 ) Answer: 3x²+5x+13 Question B: (3x² + 8x + 1)+(2x² + 8x + 4 ) Answer: 5x²+16x+5 Question C: (3x² + 5x + 7)(4x² + x + 1 ) Answer: x²+4x+6 Question D: C. (3x² + 5x + 7)(4x² + x + 1 ) Answer: 5x Basically, all u do is what the operation between the 2 parenthese says. For example, questions a and b have an addition symbol, which means ur gonna add. Questions c and d have a minus symbol, which means ur gonna subtract. The pluses and minuses in the parenthese are just telling u if its positive or negative. Hope this helped! 
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