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

Tutors Answer Your Questions about Exponents-negative-and-fractional (FREE)

Question 804095: Express as a single fraction: a^-2 + b^-3
1/a^2 + 1/b^3 = 1/a^2+b^3.
This is not correct. Can I get help with my work?
Thank you.
Click here to see answer by richwmiller(17219)

Question 804095: Express as a single fraction: a^-2 + b^-3
1/a^2 + 1/b^3 = 1/a^2+b^3.
This is not correct. Can I get help with my work?
Thank you.
Click here to see answer by DrBeeee(684)

Question 804182: como se resuelve este problema: (x+1)(2x+5)=(2x+3)(x-4)+5

Click here to see answer by richwmiller(17219)

Question 804493: what does the number 1095 millionths look like in scientific notation
Click here to see answer by erica65404(394)

Question 804493: what does the number 1095 millionths look like in scientific notation
Click here to see answer by Alan3354(69443)

Question 804640: (96x^3/6x^2y^4)^1/4. This is a fractional exponent problem. Can I get step by step help with how to solve this please?
Thank you for your time.
Click here to see answer by solver91311(24713)

Question 805241: x+12 = -7
Click here to see answer by rfer(16322)

Question 806080: I know the answer to this problem, however I do not understand how to complete each step, only the 1st one, by putting the entire problem under a 1 by using definition of negative exponent.
(2a to power of -2 times b to the power of 2 times z to the -10th power) all to the -5th power.
Thanks you, Melissa (sorry I don't have the fancy symbols)
Click here to see answer by josmiceli(19441)

Question 808809: 20000(1-0.25)^3
Click here to see answer by rfer(16322)

Question 808809: 20000(1-0.25)^3
Click here to see answer by Alan3354(69443)

Question 810768: (a^-1 + b^-1)‾�
Click here to see answer by Alan3354(69443)

Question 811685: simplify the compound fraction and show work:
1/(x+1) +1/2
over
3/(2x^2 +4x +2)
Click here to see answer by brysca(112)

Question 811685: simplify the compound fraction and show work:
1/(x+1) +1/2
over
3/(2x^2 +4x +2)
Click here to see answer by MathTherapy(10555)

Question 813608: Factor (2x)x^1/2 + 1/2x^-1/2(x^2 + 1) The text author gives the answer of
1/2x^-1/2(5x^2 + 1) I am unable to determine how to arrive at his answer.
Thanks, Bob
Click here to see answer by richwmiller(17219)

Question 813933: x over 3 equals negative 11
Click here to see answer by ewatrrr(24785)

Question 815369: I am trying to solve (2^(1/2)+2^(3/2))^2
I solved it as:
2^1 + 2^3
2+8
10
I can't figure out what I'm doing wrong. I know the answer should be 18.

Click here to see answer by Alan3354(69443)

Question 815625: (2x)^3+2^3x

Click here to see answer by Alan3354(69443)

Question 816339: (x + 5)^2/3 = 125
Click here to see answer by stanbon(75887)

Question 816419: how do i begin to simplify v^3-4v/2v^2-5v+2
Click here to see answer by ankor@dixie-net.com(22740)

Question 817140: Simplify. Write with positive exponents.
[(b^3/4)/(a^-1/2)]^8
Click here to see answer by jsmallt9(3758)

Question 817368: How do I evaluate f(-7)

Click here to see answer by LinnW(1048)

Question 817367: How do I rewrite y + 3 = 0 using function notation?
Click here to see answer by LinnW(1048)

Question 812959: if the school supply store has 24 pencils,and 1/4 of them are green,how many green pencils does the school supply store have? please help me understand

Click here to see answer by LinnW(1048)

Question 812304: 3x^3(3x^3x^4)^2
Click here to see answer by LinnW(1048)

Question 811108: what are the solutions to this equation ? x^-3x= -5/4
Click here to see answer by LinnW(1048)

Question 811081: 8^(-1/2)
Click here to see answer by LinnW(1048)

Question 803935: Please help me solve this equation: -9h^2k4/18h^5j^3k^4
I know that the k^4 cancel out in the numerator and denominator, making a 1. Also, I know that -9/18=-0.5. Other than that I am quite stomped.
Good Luck and Thank You!!
Click here to see answer by LinnW(1048)

Question 802368: Hi!
How do I simplify the following:
(x^-4+y^-2)/(x^-6+y^-4)
?
The automatic simplifier only goes this far
(1/x^4+1/y^2)/(1/x^6+1/y^4), and if I continue from there I managed to somehow get simplify it to x^2y^2 but as I have no answer key, any help would be appreciated! Thanks!
Click here to see answer by LinnW(1048)

Question 794675: what is 4x^-7 in fraction form? Or how can you use fractions to prove the following to be true?
x^-5*4x^-7=4x^-12
Click here to see answer by LinnW(1048)

Question 817811: (2x^-2)/(3y^3) ^-3
simplify leaving positive exponents only using rules of exponents
Click here to see answer by FightinBlueHens(27)

Question 818311: Express using positive exponents 6 to the -3rd power.
I dont remember how to solve this problem
Click here to see answer by rothauserc(4718)

Question 820005: How would i solve this expression to make it a positive exponent. The expression is 1/8-2, the "-" is a negative.
Click here to see answer by ewatrrr(24785)

Question 820764: how can i solve this problem 8/5x^-2/9 i need to write it in positive exponents only
Click here to see answer by jhunjiro(67)

Question 821662: I caant seem to get this to show properly with the negative one-halp exponent

Click here to see answer by Alan3354(69443)

Question 821777: what would the answer be if it's (5y)3?would it be 53y3 or 15y3 or 125y3?I'm confused!

Click here to see answer by stanbon(75887)

Question 822241: how do i simplify (y^2/3/x^3/4)^2/3?
Click here to see answer by LinnW(1048)

Question 789513: (-2)^-3=?
Click here to see answer by tommyt3rd(5050)

Question 804233: Rewrite the expression using only positive exponents.
9(u^-5)v^2
Click here to see answer by tommyt3rd(5050)

Question 820834: if x+1/x= 2 then what is the value of x^3+1/x^2
Click here to see answer by tommyt3rd(5050)

Question 811074: 18-3y^(1/2)=25
Click here to see answer by tommyt3rd(5050)

Question 804537: What is z?
Z over 3 minus 3z over 4 plus 1 over 2 equals negative 1 over 3
Click here to see answer by tommyt3rd(5050)

Question 818058: Please help me solve this equation

Simplify the following algebraic expression
2x + 8 - 3x + 7
Click here to see answer by tommyt3rd(5050)

Question 818054: Please help me simplify this expression 3x-72 if x = -12
Click here to see answer by tommyt3rd(5050)

Question 803972: 1 divided by 5 to the negative 4th power

Click here to see answer by tommyt3rd(5050)

Question 795657: (A/B)^-m = (B/A)^m
Click here to see answer by tommyt3rd(5050)

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