Need some Algebra help - Quick!

[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

 

[dighn]

why dont you try to do some and we'll correct/add to the answers. cuz like this you are gonna get flamed

 

[SaigonK]

I dont even know where to start

 

[sash1]

it's summer, please don't make me bust out last years notes! During the summer, I do not use my brain!

~Aunix

Mebbe I'll help later. When I feel like moving away from my computer. Unless this is urgent

Edit - Oh! It seems the title includes "quick." Guess that means it's urgent... Like I said, no brain during the summer!

 

[SaigonK]

yup...its urgent...i am trying to figure all this out by midnight

 

[CaseTragedy]

for assistance, please pm me for paypal info.

 

[sash1]

What grade are you in? This stuff is so easy I feel kinda dumb doing them. No offense, I'm just really good at math, albeit I absolutely hate it

~Aunix

 

[xcript]

Originally posted by: CaseTragedy
for assistance, please pm me for paypal info.

Haha.

SaigonK, isn't that like grade 9 algebra?

 

[SaigonK]

Yup it probably is..but i wont learn if no one helps.

 

[CubicZirconia]

Originally posted by: SaigonK
Yup it probably is..but i wont learn if no one helps.

Did you read the book or talk to your teacher?

 

[Stojakapimp]

by midnight? It's only 6 pm here. Do you live in Saigon?

 

[Tdawg951]

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?
A rational number is anything that can be written in a fraction, so -2/1, -1/3, 0/1, 4/5 are all rational (thus sqrt of 2 and 3, and pi are not)
2. Evaluate (show work!). ((-2)^2 - 6)/(7 - 9)
(answer is 1, i think)Just work through the parenthesis, doing the (-2)^2 first and the division by 7-9 last

these are easy, basic math functions
3. Evaluate (show work!). |-4| + 4 * (6 - 8)
(answer is -4)
4. Evaluate (show work!). 6 / (-2)
(-3)
5. Evaluate (show work!). 6 / (-1/2)
(-12)
6. Identify the property that justifies the following equation. 4 + (3 + x) = (4 + 3) + x
transitive property? i dont rembmer exactly
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
answer is 16, i think
10. Determine if the following equation is true if x = 4. 2 *(2 * x - 3) = 10
if you get an answer for x that looks good, its true

hope that helps, i just put the answers there so you could check your work, dont just copy them

 

[MrBond]

2-5, there's one thing you need to remember.

Please Exhume My Dead Aunt Sally

P: Parenthases
E: Exponents
M: Multiplication
D: Division
A: Addition
S: Subtraction

Thats the order you preform operations in.

Remember a negative number squared is a positive number. Cubed, its' a negative number again, to the fourth power, it's positive (see the trend here?)

That being said, the answers for 2-5 are -1, -4, -3, -12. You're on your own for work

 

[fs5]

seriously you need to learn how to do this crap yourself, this is BASIC math that anybody should be able to do at the drop of a hat. Use a book and figure stuff out yourself, you'll retain a lot better.

 

[pray4mojo]

Uh...how do you show work for #4 and #5?

4) -3
5) -12

 

[gwlam12]

look through your examples in the book. those are bound to help since your problems are pretty basic

 

[Yossarian]

You don't wanna know what I'm gonna do to your Aunt Sally once I dig her up.

 

[sash1]

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. This makes calculus look so hard...

~Aunix

 

[gwlam12]

Originally posted by: MrBond
2-5, there's one thing you need to remember.

Please Exhume My Dead Aunt Sally

Hm, I always learned it as Please Excuse My Dear Aunt Sally. Less morbid.

 

[pray4mojo]

Originally posted by: MrBond
2-5, there's one thing you need to remember.

Please Exhume My Dead Aunt Sally

P: Parenthases
E: Exponents
M: Multiplication
D: Division
A: Addition
S: Subtraction

Thats the order you preform operations in.

Remember a negative number squared is a positive number. Cubed, its' a negative number again, to the fourth power, it's positive (see the trend here?)

That being said, the answers for 2-5 are -1, -4, -3, -12. You're on your own for work

Well I was taught "Please Excuse My Dear Aunt Sally"

 

[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.

 

[sash1]

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?

 

[Dark4ng3l]

I was going to help.... But then I noticed how easey those questions are. I mean those are like the easiest possible questions you can ask us to solve for you. Honestly it would have been easier to just do it you self than to type em out.

 

[GregGreen]

1. no idea
2. 1
3. -4
4. -3
5. -12
6. assciative
7. 3(y+3)
8. too much actual work for me to get the motivation to do
9. 16
10. it is true

 

[Stojakapimp]

why can't you write it as pi/1?