Questions on Algebra: Radicals -- complicated equations involving roots answered by real tutors!

Tutors Answer Your Questions about Radicals (FREE)

Question 262329: 2x^4-72x^2=0 what is the answer? this one is killing me.
Click here to see answer by richwmiller(17219)

Question 262419: sqroot(3-x) + 28 = x + 25
x=?
Click here to see answer by drk(1908)

Question 262443: Write the radical expression ^5sqroot(2^3) using exponents.
^5root(2^3)
(2^3) is under the radical with a 5 in superscript above the radical
Click here to see answer by jim_thompson5910(35256)

Question 262618: i need to find the value of the variable that makes each expresion a real number for the following equation
(2y-7)1/2 what is the real expresion for y

Click here to see answer by stanbon(75887)

Question 262725: Hi
If I have w is less than and or equal to -5 for 1 answer and the - sideways sign that lookes like to circles contected together, how would I plot it on a number line?
Thanks
Rachel
Click here to see answer by drk(1908)

Question 262722: Hi
I need help with this problem.
5 over x-4 - 6 over x+3 = 1
Thank you
Rachel
Click here to see answer by vksarvepalli(154)

Question 262745: Simplify each expression. Rationalize all denominators. Assume that all variables are positive.
1.} http://i931.photobucket.com/albums/ad157/DominiqueakaDyme18/95736-8172006-32524-PM-1294056231.gif
Thank you so much for all the help...really having trouble wit these things...;`)
Click here to see answer by richwmiller(17219)

Question 263222: I need to put this as a single radical expression
(3sqroot sign 8)(2 sqroot sign 3)
Thanks
Click here to see answer by unlockmath(1688)

Question 263261: x(x-2)^3-35(x-2)^2=0
Click here to see answer by mananth(16946)

Question 263259: solve: x^5/6 + x^2/3-2x^1/2 =0
thanks!
Click here to see answer by mananth(16946)

Question 263300: what is the 7nth root of -2187a raised to 8
Click here to see answer by Alan3354(69443)

Question 263262: radical 1+4 radical x = 1+ radical x
the first part: radical 1+4 radical x is all under the first radical. the 4 is times the radical x. it's a radical under a radical. help!
thanks!
Click here to see answer by Alan3354(69443)

Question 263349: First of all, how do I express a radical expression using a standard keyboard. For example, I express an exponent using a carat followed by the exponent; how do I express radical 2t^2?
Click here to see answer by stanbon(75887)

Question 263419: Hint for this assignment: Pay attention to the units of measure. You may have to convert from feet to miles several times in this assignment. You can use 1 mile = 5,280 feet for your conversions.
1. Many people know that the weight of an object varies on different planets, but did you know that the weight of an object on earth also varies according to the elevation of the object? In particular, the weight of an object follows this equation: , where C is a constant, and r is the distance that the object is from the center of the earth.
a. Solve the equation for r.
b. Suppose that an object is 100 pounds when it is at sea level. Find the value of C that makes the equation true. (Sea level is 3,963 miles from the center of the earth.)
c. Use the value of C you found in the previous question to determine how much the object would weigh in
i. Death Valley (282 feet below sea level)
ii. The top of Mt McKinley (20,320 feet above sea level)

Click here to see answer by richwmiller(17219)

Question 263477: Hi there! I am lost on this! Thank you!
Determine whether the triple of numbers can be the sides of a right triangle.

9, 12, 16

A)

Yes

B)

No
Click here to see answer by checkley77(12844)

Question 263503: I saw a statement:
If a is negative and n is odd then there is just one n-th root, and it is negative also. For example, 3 cube root(-1) = 5th root (-1) = -1.
What is the reasoning for those three numbers above to be equal?
Click here to see answer by stanbon(75887)

Question 263255: solve: radical 6x-2=radical 2x+3 - radical 4x-1
i did not know what to use for the radical sign? is it ~ ? thank you.
Click here to see answer by jsmallt9(3758)

Question 263572: 6x^3+54x^2+120x=0
using x=y^2
Click here to see answer by drk(1908)

Question 263543: Hi
I need help with this problem
z to the 2 thirds - 49 over 64 = 0
I'm to the point where I have 49 over 64 parenthesis to the 3rd all under a square root sign. I'm not sure how to finish from this point.
Thanks
Rachel
Click here to see answer by jim_thompson5910(35256)

Question 263603: I don't even know where to begin on this one! Please help!?!? Thank you!
A pollster wants to minimize the effect the order of the questions has on a person's response to a survey. How many different surveys are required to cover all possible arrangements if there are 5 questions on the survey?
Click here to see answer by stanbon(75887)

Question 263911: Hi
z^2 +14z +49 over 5z^2 +38z +21 times 5z^2 -17z-12 over z+7

I'm getting z-4 for an answer. Am I figuring this correctly?
Thanks
Rachel
Click here to see answer by jim_thompson5910(35256)

Question 263977: solve.
sqrt(9x+67)=x+5
The solution is x=
(simplify answer).
Please help me solve.
Click here to see answer by jim_thompson5910(35256)

Question 264214: when 5√20 is written in simplest radical form, the result is k√5. What us the value?
Click here to see answer by stanbon(75887)

Question 264487: working different math problems

Click here to see answer by CharlesG2(834)

Question 264531: simplify by taking roots of the numerator and the denominator.Assume all expressions under the radicals represent positive numbers.
cubed rt of 512x^5/y^3
please help....
Click here to see answer by jim_thompson5910(35256)

Question 264666: Please show how to work out:
6 the sq root of 20 plus 8 the sq root of 5 minus 5 the sq root of 45
Click here to see answer by Alan3354(69443)

Question 265047: simplify
∛(-1/64)
please help me.
Click here to see answer by jim_thompson5910(35256)

Question 265386: I've tried every thing I know and I still don't get a real answer. Would you please help me solve it?
Click here to see answer by CharlesG2(834)

Question 265842: what is the square root of negative 20 plus the square root of negative 180

Click here to see answer by stanbon(75887)

Question 265953: how do you find the simplest form of this expression?
square root 5 x square root 7
Click here to see answer by Alan3354(69443)

Question 265955: how do you find the simplest form of this expression?
square root 3 x square root 5
Click here to see answer by drk(1908)

Question 265956: how do you find the simplest form of this expression
square root 9 x square root 8
Click here to see answer by stanbon(75887)

Question 266108: Subtract and simplify 3√27 - 5 3√8
Click here to see answer by jim_thompson5910(35256)

Question 265854: Tony needs a glass bell jar in the shape of a cylinder with a hemisphere on top. The height of the cylinder must be 3 inches longer than its radius and the volume must be 72pi cubic inches. What should the radius of the cylinder be?
The name of the lesson is Fundamental Theorem of Algebra.
Do i need to find the roots to get the radius?
Click here to see answer by ankor@dixie-net.com(22740)

Question 266577: how to solve ah radicals and their structure

Click here to see answer by stanbon(75887)

Question 266926: 1) Insert the chosen values for �p� and �a� into the formula listed above.
C=P * A ^ T
p = 180 cars on the road
a = 2 growth factor
t = day 2, day 4, day 6
C = p 180 * a 2 ^ t 2
C = P = 180 * 2 = 360
C = 360 ^ 2 = 720
C = 720 cars

C = 180 * 2 ^ 4
C = P = 180 *2 = 360
C = 360 ^ 4 = 1440
C = 1440 cars

C = 180 * 2 ^ 6
C = 180 *2 = 360 = 2160
C = 360 ^ 6 = 2160
C = 2160 cars
did i do this right?
Click here to see answer by JBarnum(2146)

Question 268008: I am stuck on thise problem, I tried to do it but not sure I did it right. Please help!! (2 sqrt y)^3
Click here to see answer by Alan3354(69443)

Question 268666: -4 times the square root of 45 over the square root of 144
Click here to see answer by persian52(161)

Question 268733: how do you solve x squared + 10x + 25 all under a radical
Click here to see answer by persian52(161)

Question 269084: Simpify. Write the answer in exponential form without negative exponents
x^1/2/x^1/3
Click here to see answer by jim_thompson5910(35256)

Question 269083: Simpify. Write the answer in exponential form without negative exponents
x^4*x^2
Click here to see answer by jim_thompson5910(35256)

Question 269077: Evaluate if possible. If the expression is not a real number, so state
16^3/2
Click here to see answer by jim_thompson5910(35256)

Question 269121: I need to find the Distance between the points ( , ),( , )
Using the Distance formula d= sqrt[(x2-x1)^2+(y2-y1)^2
I get sqrt[(sqrt12-sqrt3)^2 + (sqrt27-sqrt8)^2]
Which i simplified to:
Sqrt[2(2*sqrt3-sqrt2)
The answer in the back of my book says:
sqrt[38-12*sqrt6]
So what did I do wrong or miss? I can't figure it out.
Click here to see answer by stanbon(75887)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840, 6841..6885, 6886..6930, 6931..6975, 6976..7020, 7021..7065, 7066..7110, 7111..7155, 7156..7200, 7201..7245, 7246..7290, 7291..7335, 7336..7380, 7381..7425, 7426..7470, 7471..7515, 7516..7560, 7561..7605, 7606..7650, 7651..7695, 7696..7740, 7741..7785, 7786..7830, 7831..7875, 7876..7920, 7921..7965, 7966..8010, 8011..8055, 8056..8100, 8101..8145, 8146..8190, 8191..8235, 8236..8280, 8281..8325, 8326..8370, 8371..8415, 8416..8460, 8461..8505, 8506..8550, 8551..8595, 8596..8640, 8641..8685, 8686..8730, 8731..8775, 8776..8820, 8821..8865, 8866..8910, 8911..8955, 8956..9000, 9001..9045, 9046..9090, 9091..9135, 9136..9180, 9181..9225, 9226..9270, 9271..9315, 9316..9360, 9361..9405, 9406..9450, 9451..9495, 9496..9540, 9541..9585, 9586..9630, 9631..9675, 9676..9720, 9721..9765, 9766..9810, 9811..9855, 9856..9900, 9901..9945, 9946..9990, 9991..10035, 10036..10080, 10081..10125, 10126..10170, 10171..10215, 10216..10260, 10261..10305, 10306..10350, 10351..10395, 10396..10440, 10441..10485, 10486..10530, 10531..10575, 10576..10620, 10621..10665, 10666..10710