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Need some Algebra help - Quick!

SaigonK

SaigonK

Diamond Member
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
 
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! 😛
 
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
 
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
Click to expand...


hope that helps, i just put the answers there so you could check your work, dont just copy them
 
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
 
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.
 
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
 
Originally posted by: MrBond
2-5, there's one thing you need to remember.

Please Exhume My Dead Aunt Sally
Click to expand...

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

 
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
Click to expand...

Well I was taught "Please Excuse My Dear Aunt Sally" 😛
 
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.
Click to expand...

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

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

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? 😀
 
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.
 
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
 
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