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

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

Question 688881: book answer.....
5(3a-8)= 15a
how? i got.....
5(5a) = 25a
Click here to see answer by Alan3354(69443)

Question 688858: I am working on a math page. It says: Lorenzo needed to find 1/9 of 27. His friend Carla told him to write 1/9 as 3 to the -2 and 27 as 3 to the 3 to get 3 to the negative 6. Was Carla correct? Explain.
I think she's correct, but I'm not quite sure on how to explain it.
Click here to see answer by MathTherapy(10555)

Question 690906: what is 5 5/8 divided by 4 1/2?
Click here to see answer by rfer(16322)

Question 690906: what is 5 5/8 divided by 4 1/2?
Click here to see answer by Alan3354(69443)

Question 691078: 9^1/3*81^1/3
Click here to see answer by stanbon(75887)

Question 693767: please help me on this equation:
negative four and three fourths plus three and three fifths x = 13 and one fourth
-4 3/4 + 3 3/5 x = 13 1/4
thank you
Click here to see answer by rfer(16322)

Question 693888: What is the answer to 8/7 to the 4th power multiplied by 8 to the 3rd power
Click here to see answer by unlockmath(1688)

Question 695494: In an equation such as: 2(3x+4)/3 - x-4/2 = 5, I don't recall if I should establish a common denominator first and then cancel that out by multiplying both sides or transpose one of the unknown statements to the other side. Can you help me with this.
Thanks
Click here to see answer by mananth(16946)

Question 695696: 7x+2(11-4x)<2(3-1/2x)
Click here to see answer by stanbon(75887)

Question 696534: (3ab-3)-2 over (3a3b)-3
Click here to see answer by MathLover1(20850)

Question 696944: Simplify: -9(3a)^ -4
-9(1/3a ^4)
9/3a^4
Did I do this correctly
Click here to see answer by MathLover1(20850)

Question 697255: (-27)-3
Click here to see answer by checkley79(3341)

Question 697585: Solve for x: 4^(-2)*4^(x+1)*4^(3)=4^(5)
Click here to see answer by ankor@dixie-net.com(22740)

Question 698923: x^3/2-x^5/2=x^1/2( ? )
What goes where the question mark is?
Click here to see answer by KMST(5328)

Question 700105: Which of the following simplifies to a negative number?
A.)-4^-4
B.)(-4)^-4
C.)4^-4
D.)1/4^-4
please help.
Thank you.
Click here to see answer by stanbon(75887)

Question 700331: What is 1/64 as a number with an exponent
Click here to see answer by ankor@dixie-net.com(22740)

Question 700899: 25p10power/15pcubed

Click here to see answer by neatmath(302)

Question 701649: how do you solve this equation (23245)^-1/3=
Click here to see answer by Alan3354(69443)

Question 701438: -2 over a-b , times b-a
Click here to see answer by ankor@dixie-net.com(22740)

Question 701931: Simplify the Expression. Write the Answer with positive exponents.

All the numbers behind the letters are integers. Been a long time since I have done algebra and its greek to me.
Click here to see answer by Edwin McCravy(20060)

Question 702418: please solve
(10m^4n^5p^7)^5
Click here to see answer by jim_thompson5910(35256)

Question 703030: -34=3d+8/3

Click here to see answer by lynnlo(4176)

Question 703263: Please help me with this word problem, I'm out of my depth:
If 12 g of a radioactive substance are present initially and 4 yr later only 6 g remain, how much of the substance will be present after 7 yr?
Thank you,
Samara
Click here to see answer by josgarithmetic(39623)

Question 703780: Express using positive exponents. Then if possible, simplify
r over v to the power of -5
Click here to see answer by Alan3354(69443)

Question 703776: simplify. 7m zero power when m=1.7
Click here to see answer by Alan3354(69443)

Question 704355: help please, i am so stumped what do they mean buy simplify q^-12/q^-10 then on the side it states (≠0) i figured they wanted me to simplfy the equation so that it equaled q^2 but the ≠0 stumped me
Click here to see answer by ankor@dixie-net.com(22740)

Question 704434: 1-5/8x greater than or equal sign 7
Click here to see answer by rfer(16322)

Question 704690: (x-1)^3+8=0 solve for x
Click here to see answer by mananth(16946)

Question 705260: How do I evaluate 8^-4/3? I am having difficulty understanding how to evaluate an exponent when it is both fractional and negative.
Click here to see answer by Edwin McCravy(20060)

Question 705470: Please help me solve this equation my answer that I got was 1024.
9 to power of 5/2
Click here to see answer by KMST(5328)

Question 705833: I really need help on how to do this.
(x-1)^2/3-25=0
Thank you!
Melissa
Click here to see answer by Alan3354(69443)

Question 705833: I really need help on how to do this.
(x-1)^2/3-25=0
Thank you!
Melissa
Click here to see answer by MathLover1(20850)

Question 706623: ((8.85*(10^-12))*(.0006)*(.0004))/4
Click here to see answer by MathLover1(20850)

Question 706642: 5X^(2/3)-4X^(1/3)-1=0 BY ANOTHER METHOD OTHER THAN SUBSTITUTION THX
Click here to see answer by josgarithmetic(39623)

Question 708824: MPHc = .5(L)^.5 / (Hc)^.5 where L = 1000 and MPHc = 1.581
This is what I got so far
1.581 = .5(10,000)^.5 / (Hc^.5)
1.581 = 50/ (Hc^.5) not sure how to bring the ^.5 to the other side to solve for Hc

Click here to see answer by josgarithmetic(39623)

Question 709635: Express using positive exponents. Then, if possible, simplify.
(a/2)^-4
Click here to see answer by josh_jordan(263)

Question 710672: Help me factor:
(X+5)^(-1/2) - (X+5)^(-3/2)
Click here to see answer by lynnlo(4176)

Question 711645: I have problem 4^-2 +8-6^2(2+1). I got answer of -6.25. Book has -99.9375. What did I do wrong. I thought you had to make exponent positive before you could solve it. Tks
Click here to see answer by god2012(113)

Question 711585: Simplify each of the following, expressing your answers with positive
indices.
(p^4)^-3 q^6 � p^5(q^-2)^2
sorry if its hard to understand :(

Click here to see answer by lynnlo(4176)

Question 712548: What is the answer to this question:
-5.31&10^8/-3*10^-5
Click here to see answer by algebrahouse.com(1659)

Question 712742: Does 9-x2 equal -x2+9
If so how do you reslove:
assume x=2
9-(2)2
9-4=5
-(2)2 +9
4+9=13

Click here to see answer by Alan3354(69443)

Question 712956: I need help solving this equation. (-1/2)^5
I've tried it in a calculator and i get -0.03125, and my teacher said it was wrong.
Click here to see answer by stanbon(75887)

Question 713200: what is the rule between negative and positive exponents in a scientific notation multiplication or division problem? Can't remember which sign is taken, only remember that for x you add exponent and for / you subtract.
Click here to see answer by rfer(16322)

Question 713740: (-3) (-3)6
Click here to see answer by checkley79(3341)

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