Need some Algebra help - Quick!

[dighn]

Originally posted by: Stojakapimp
why can't you write it as pi/1?

both numerator and denomenator have to be integers

 

[xcript]

Originally posted by: AunixM3

Originally posted by: gwlam12

Originally posted by: AunixM3
2. (-2)^2 = 4
4 - 6 = -2
7 - 9 = -2
-2/-2 = 1

3. |-4| = 4
4(6 - 8) = 4(-2) = -8
4 + -8 = -4

4. 6/-2 = -6/2 = -3/1 = -3

5. 6/(-1/2) = 6 * -2/1 = 6(-2) = -12

6. Associative [for addition]

9. 2(-2) - 4(3) + 2(4^2) = -4 - 12 + 2(16) = -16 + 2(16) = 16

rest involve variables. I need a piece of paper. Get back ina sec.

Come on, thought you were supposed to be good at math. No papers. 🙂

Aye aye! I am taking AP calculus, I am good. But it's summer, and I don't use my brain. I thought I already explained this? 😀

Does this kind of basic math even require the use of one's brain?

 

[sash1]

Originally posted by: xcript

Originally posted by: AunixM3

Originally posted by: gwlam12

Originally posted by: AunixM3
2. (-2)^2 = 4
4 - 6 = -2
7 - 9 = -2
-2/-2 = 1

3. |-4| = 4
4(6 - 8) = 4(-2) = -8
4 + -8 = -4

4. 6/-2 = -6/2 = -3/1 = -3

5. 6/(-1/2) = 6 * -2/1 = 6(-2) = -12

6. Associative [for addition]

9. 2(-2) - 4(3) + 2(4^2) = -4 - 12 + 2(16) = -16 + 2(16) = 16

rest involve variables. I need a piece of paper. Get back ina sec.

Come on, thought you were supposed to be good at math. No papers. 🙂

Aye aye! I am taking AP calculus, I am good. But it's summer, and I don't use my brain. I thought I already explained this? 😀

Does this kind of basic math even require the use of one's brain?

No.

 

[Tdawg951]

Originally posted by: Stojakapimp
why can't you write it as pi/1?

thats a decimal and a fraction, not just a fraction, or specifically a ratio of two numbers

 

[xcript]

Damnit, stop giving him the answers everyone. 🙁

 

[gwlam12]

Originally posted by: SaigonK
Ok i am trying to work out some problems, and I need some help. Frankly i suck at math..i see it and then i go completely blank.

A few pre-requisites:

A. YES, I would like answers to these questions.
B. NO i do not just want the answers..i would like some step by step help if anyone is up to it, I am trying to understand what I am doing.

So here are the problems:

1. Which of the numbers -2, -sqrt(2), -(1/3), 0, 0.8, sqrt(3), ?(Pi) are rational numbers?
2. Evaluate (show work!). ((-2)^2 - 6)/(7 - 9)
3. Evaluate (show work!). |-4| + 4 * (6 - 8)
4. Evaluate (show work!). 6 / (-2)
5. Evaluate (show work!). 6 / (-1/2)
6. Identify the property that justifies the following equation. 4 + (3 + x) = (4 + 3) + x
7. Simplify the follow expression (show work!). 3 * y + 9
8. Simplify the follow expression (show work!). 2 * x * (3 * x - 2) - (2 * x^2 + 4)
9. Evaluate the follow expression with a = -2, b = 3, and c = 4
2a ? 4b + 2c^2
10. Determine if the following equation is true if x = 4. 2 *(2 * x - 3) = 10

eep, removed the answers.

 

[gwlam12]

Originally posted by: Tdawg951

Originally posted by: Stojakapimp
why can't you write it as pi/1?

thats a decimal and a fraction, not just a fraction, or specifically a ratio of two numbers

pi itself is not a rational number, too.

 

[gwlam12]

Originally posted by: xcript
Damnit, stop giving him the answers everyone. 🙁

he logged off. looks like he's done getting what he needed. 🙁

 

[Tdawg951]

Originally posted by: gwlam12

Originally posted by: xcript
Damnit, stop giving him the answers everyone. 🙁

he logged off. looks like he's done getting what he needed. 🙁

haha that stuff is so insanely easy, is this guy like in 6th grade or something?

 

[Tdawg951]

Originally posted by: gwlam12

Originally posted by: Tdawg951

Originally posted by: Stojakapimp
why can't you write it as pi/1?

thats a decimal and a fraction, not just a fraction, or specifically a ratio of two numbers

pi itself is not a rational number, too.

i believe the specific definition for a rational number is one that can be written as a fraction (as in no decimals). Thus some repeating decimals count, like 1/3 and 2/3. Pi is just a real number

 

[SaigonK]

So for all you thread crapping people..bite me.

I wasnt looking for answers, I was looking for the work to get the answers. I didnt logoff, i am still here and have been here.
next time read a bit more, i dont need your sh!t because you think the math is remedial or not...I asked for help...and at least someone here was willing to help and I commend them for that.

if you dont want to help me work out this stuff then dont post a reply..

 

[SaigonK]

Christ...when it comes to computer systems, I forget more than most people know everyday...but when they asl for help I dont tell them to stop being a retard and do the work, I try and H-E-L-P! Look into it...its quite a concept.

 

[xcript]

Stop posting and get on with your homework young man.

 

[SaigonK]

Why dont you stop thread crapping...I am working on the problems now...and dont call me young man..it isnt like you know that you are my elder.

 

[SaigonK]

Ok so problem two here is what I did and what I got:


((-2)^2 - 6)/(7 - 9)

-2*2= -4 - 6 = -10 / ( 7-9=-2) = -12 ? ?
I think i am missing something?

 

[dighn]

Originally posted by: SaigonK
Ok so problem two here is what I did and what I got:


((-2)^2 - 6)/(7 - 9)

-2*2= -4 - 6 = -10 / ( 7-9=-2) = -12 ? ?
I think i am missing something?

that's not right
(-2) ^ 2 = (-2)*(-2) = 4

 

[xcript]

Originally posted by: SaigonK
Why dont you stop thread crapping...I am working on the problems now...and dont call me young man..it isnt like you know that you are my elder.

Wow, what's your problem? I was joking.

Originally posted by: SaigonK
((-2)^2 - 6)/(7 - 9)

-2*2= -4 - 6 = -10 / ( 7-9=-2) = -12 ? ?
I think i am missing something?

(-2)^2=4

Therefore:

x=(4-6)/(7-9)
x=-2/-2
x=1

Don't get so stressed guy. It's not good for you.

 

[SaigonK]

I am stressed more so because I dont understand than at anyone inparticular...as was said..it is easy but I swear I just dont get it....
It is irritating to me that I am having such a hard time with what is obviously easy for so many people... 🙁

 

[SaigonK]

Ok i jumped to #10 and got this:


10. Determine if the following equation is true if x = 4. 2 *(2 * x - 3) = 10
True
2x4-3=5x2=10 <--this yields my answer of 10

 

[xcript]

Originally posted by: SaigonK
Ok i jumped to #10 and got this:


10. Determine if the following equation is true if x = 4. 2 *(2 * x - 3) = 10
True
2x4-3=5x2=10 <--this yields my answer of 10

There you go.

 

[SaigonK]

Wohoo! got one right...but the #2 is still wierd to me....
even if i use a calculator i get a different answer...mind playing that one out for me fully?

 

[dighn]

Originally posted by: SaigonK
Wohoo! got one right...but the #2 is still wierd to me....
even if i use a calculator i get a different answer...mind playing that one out for me fully?

you aren't using the calculator correctly then (eg forgetting a parenthesis)

Evaluate (show work!). ((-2)^2 - 6)/(7 - 9)
first you evaluate (-2)^2, that's equivalent to (-2) * (-2) which is 4
(4-6)/(7-9) = (-2)/(-2)
= 2/2 = 1

 

[sash1]

holy sh!t, do you really live in Auburn? We live pretty close!

...Well, I guess this says a lot about the school systems in Maine. 😛 precisely why I'm consdiering graduating as a Junior.

~Aunix

 

[SaigonK]

Yup! I do live in Auburn. And yes the school systems suck. 🙂

 

[CoolTech]

Originally posted by: AunixM3
holy sh!t, do you really live in Auburn? We live pretty close!

...Well, I guess this says a lot about the school systems in Maine. 😛 precisely why I'm consdiering graduating as a Junior.

~Aunix

LOL