Questions on Algebra: Negative and Fractional exponents answered by real tutors!

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Question 84285: Can you help me sovle this problem? The problem is 1 over x to the negative 3rd power. I do not know how to sovle that kind of problem. Can you please help me!
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Question 85014: How do you solve this problem?
x-2/2-x+2/4=1/2

Click here to see answer by stanbon(75887) About Me 

Question 85427: a%5E-1b%5E-2c3
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Question 85472: Find the perimeter of the given figure, not sure what to do.
rectangle shape with the equation to solve.
x/2x-5 and 8/2x-5
please help

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Question 85471: I am having to multiply the fractions, please show me how to do this.
2x^2-x-3 3x^2-11x-20
________ x ___________
3x^2+7x+4 4x^2-9
I really need the help, thanks

Click here to see answer by Earlsdon(6294) About Me 
Question 85471: I am having to multiply the fractions, please show me how to do this.
2x^2-x-3 3x^2-11x-20
________ x ___________
3x^2+7x+4 4x^2-9
I really need the help, thanks

Click here to see answer by jim_thompson5910(35256) About Me 

Question 85799: 5 divided by x2 - 16 minus 3 divided by x2 - x - 12
Click here to see answer by stanbon(75887) About Me 

Question 85798: 4 divided by 5x-10 minus 1 divided by 3x-6
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Question 85797: 3 divided by x2-4 plus 1 divided by x-2
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Question 85796: 2 divided by y2=y-6 plus 3y divided by y2-2y-15
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Question 85924: I am wanting to make sure I did this right. It says solve. I homeschool my 13 year old and I am having trouble checking her work.
2 1/5x - 3/4 = -4 1/2
Thankyou Vickie

Click here to see answer by Earlsdon(6294) About Me 

Question 86263: -1/4 -2 * 3/4 -5 * -3
not sure how to type fractions hope it's right if not I apologize (* is )multiplacation

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Question 86680: add or subtract as indicated. x/x+4-36/x^2-x-20
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Question 87575: Simplify.
x^2-7x+10/x^2-4

Click here to see answer by rapaljer(4671) About Me 

Question 87584: Factor x^-1/3 out of x^1/3 + x^-1/3
I multiplied x^1/3 by x^-1/3 and got x^-1 and then factored out the x^-1/3 and my answer i got was x^-1/3(i/x + 1) is this correct

Click here to see answer by stanbon(75887) About Me 

Question 87616: (1/5)^m(1/4)^18 = 1/2 1/(10)^35
what is the value of m?
answer is 35, but don't have explanation

Click here to see answer by madhujiithcharu@yahoo.co.in(28) About Me 

Question 87760: What is the answer to (3x)^-1 ?
Click here to see answer by checkley75(3666) About Me 

Question 88323: Hello,
I'm having a bit of a difficult time figuring out if I have done this problem correctly, and would greatly appreciate if someone could tell me if I've solved it correctly or if I am way off track, and show me what I need to do.
Here is the original problem that I have to solve: 9/(x-5) - 1 = 8/(x+5).
Here's the solution that I've come to: First, I moved 8/x+5 to the left, so that the equation read like this: 9/x-5 -1 -8/x+5 = 0. Then, I moved -1 to the right of the equation, so that it read like this: 9/x-5 - 8/x+5 -1 =0, which I think is the solution to the problem, right? Is there further solving or simplifying involved that I'm overlooking or is my solution correct?
Thank you very, very much in advance for your help!

Click here to see answer by stanbon(75887) About Me 
Question 88323: Hello,
I'm having a bit of a difficult time figuring out if I have done this problem correctly, and would greatly appreciate if someone could tell me if I've solved it correctly or if I am way off track, and show me what I need to do.
Here is the original problem that I have to solve: 9/(x-5) - 1 = 8/(x+5).
Here's the solution that I've come to: First, I moved 8/x+5 to the left, so that the equation read like this: 9/x-5 -1 -8/x+5 = 0. Then, I moved -1 to the right of the equation, so that it read like this: 9/x-5 - 8/x+5 -1 =0, which I think is the solution to the problem, right? Is there further solving or simplifying involved that I'm overlooking or is my solution correct?
Thank you very, very much in advance for your help!

Click here to see answer by Earlsdon(6294) About Me 

Question 88611: How do you find a solution of the exponential equation, correct to four decimals places.
20. 10^1-x = 6^x

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Question 88735: how do i evaluate an expression meaning two to the power of eight over two to the power of three
Click here to see answer by jim_thompson5910(35256) About Me 

Question 91034: How do I simplify .4/-.18?
Click here to see answer by checkley75(3666) About Me 

Question 91607: Please Help!!!!
rationalize: 3/radical 2

Click here to see answer by stanbon(75887) About Me 

Question 91855: on this problem i had troubles and wasnt sure what to do can someone fill me in?? write in the simplest form without negative exponents. it is
(2/(over) 3)^-2 (4/(over)5)^-1

Click here to see answer by homeworkhelpanytime(21) About Me 

Question 91854: can someone please tell me if i did this right? i had to write in the simplest form without negative exponents. [(-2)^-2]^-3 = -2^6 therefore i had gotten 64 as my answer.
Click here to see answer by homeworkhelpanytime(21) About Me 

Question 91852: i had to write in the simplest form without negative exponents my problem was (y^-1)^-2 and i got y^2 is that right??
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Question 92021: Can someone help me simplify this: (3x) (4x^-4)
Click here to see answer by tutorcecilia(2152) About Me 

Question 92017: Please help.
e^2x-1 = 30

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Question 92147: Simplify without negative exponents [ x y^5 / x^-4 y^2 ]^-2
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Question 92608: Simplify using only positive exponents.
-5(3/2)(4-9x)^-.5(-9)

I multiplied -5 times 3/2 and got -15/2, then multiplied this by -9 and got 135/2. So now I have 135/2 times the square root of (4-9x)^-1. Would this simplify to the square root of 1/(4-9x)? If I did this, what would that square root simplify to? I'm not sure if I've done this right so far, and don't know where to go from here.

Click here to see answer by stanbon(75887) About Me 

Question 92945: (5a2/6b)(4b/a3)
Click here to see answer by jim_thompson5910(35256) About Me 

Question 93176: I need help understanding the polynomials division problems with exponents.

(14y+8y^2+y^3+12) divided by 6+y

Click here to see answer by Edwin McCravy(20060) About Me 

Question 93175: The diameter of a rectangle is 1.3x10^-12 meters. What is the radius?
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Question 93445: Solve:
1 x 10-8
________
4 x 10 7

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Question 93708: 3(2+3-2(4-5)2-1)-3(2+4(4-2)-8+3(2-5)+1-2)1-3)+4-5
Click here to see answer by jayanthihemkos@yahoo.com(87) About Me 

Question 94283: How do I solve this problem. It says to Simplify each expression. Where appropriate express answers with positive exponents. assume base is not zero.
4%5E-2%2A4%5E3

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Question 94865: 6=4/-7t
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Question 95056: Can you help me with figuring out why a negative times a negative equals a positive?
Click here to see answer by hard(12) About Me 

Question 95087: Please help me with this

7/12 minus 6/8

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Question 95091: Please help me with this.


f(x)=x^2-2, then f(x+2)-f(x)=??

Click here to see answer by tutorcecilia(2152) About Me 

Question 95095:
PLEASE HELP ME. I don't understand this question


Click here to see answer by ionesco(12) About Me 

Question 95097: I really need help with this....PLEASE, PLEASE
2^8 times 2^-11
For this I just added the exponents and I got
2 to the negative 3rd power.
Because I have 2 to the 8th power, times 2 to the negative 11th power, I just added the exponents of 8+(-11) and I got the answer of 2 to the negative 3rd power. Is this right?

PLEASE HELP ME. I don't understand this question


Click here to see answer by ionesco(12) About Me 

Question 95099: I don't know how to do this problem. can someone please help me..please.

"The peremeter of a rectangle is 100ft. One side is 6ft longer than the other side. An equation o find the length of "x" of the shorter side is what????"

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Question 95092: Please help me with this.


Determin "k" if -2 is a root of
2x^2+ kx +2 =0

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Question 95100: I'm really confused about this one. Can someone help me please?

5-3[5-2(4x-1)]

Click here to see answer by checkley71(8403) About Me