Questions on Algebra: Square root, cubic root, N-th root answered by real tutors!

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Question 201302: Simplify the following radical:
cubic root 3 sqrt − 64c^15/cubic root 3 sqrt x^15

Click here to see answer by jsmallt9(3296)

Question 201854: how do you find the roots of an equation?
Click here to see answer by rfer(12678)

Question 201854: how do you find the roots of an equation?
Click here to see answer by jim_thompson5910(28598)

Question 201884: 3 sqrt x -4 = 2 please solve!
Click here to see answer by vleith(2825)

Question 201942: sqrt 50 / sqrt 2
Click here to see answer by jim_thompson5910(28598)

Question 201942: sqrt 50 / sqrt 2
Click here to see answer by jojo14344(1512)

Question 202029: What number would be placed in each of the empty blanks to complete the square? x^2+7x+ =12+ .
Click here to see answer by jim_thompson5910(28598)

Question 202326: square root of 90
Click here to see answer by stanbon(57424)

Question 202363: if (125/27)^x = the cubic root of 0.6 then the value of x is _______

Click here to see answer by Theo(3472)

Question 202373: I don't undeerstand what the text book is saying about these
Thanks for the help.
Express in simplest radical form.
sqrt m sqrt m^2
And
sqrt m^2 over n^2
Click here to see answer by RAY100(1637)

Question 202372: I am not sure if these are right or I need to go further with the problem text said not to use a table or calculator Show all work.Please help Thanks
Express in simpliest radical form
sqrt 3/5 I get sqrt 15/25 simplest radical form
3 sqrt 13/3 I went 3 X sqrt 13 ove sqrt 3 + 3 X 3.61 over 1.74 + 8.83 simplest radical form
Click here to see answer by RAY100(1637)

Question 202374: I am not sure which answer is right Expres in simplest radical form
sqrt 2 + sqrt 2/49 I have 2 answers 1.41 sqrt 1.41 over 7 or is it or is it 2/7
Thanks for any help
Click here to see answer by Theo(3472)

Question 202376: Solve One eighth of the square toor of 7 less than a number is 2 What is the number. Am I on the right track with 1/8 sqrt x - 7 = 2 and where do I go from here.
Thanks for any help
Click here to see answer by RAY100(1637)

Question 202375: I am not sure which answer is right Express in simplest radical form text said to not use calculator. (sqrt2 - 3)(sqrt2 + 3) I get (-1.59)(-1.59) or is the answer sqrt4 = 2
And (sqrt3 - sqrt5)(sqrt3 - sqrt 5) don't they just cancel each other out to = 1
Thanks for any help
Click here to see answer by stanbon(57424)

Question 202630: Please help me solve this:
The square of a positive number is six more than five times the positive number. Find the number.
x^2 = 5x + 6

Click here to see answer by nerdybill(6963)

Question 202704: Simplify in simplest radical form
Not sure if I have these right or I have to go further

I get
And

I get
I'd appreciate it if someone could tell me if these are right
Click here to see answer by jsmallt9(3296)

Question 202919: I would appreciate it if someone could tell me if these are right. Thanks so much
Express in simplest radical form.
sqrt 25a^2b^2
I get 5ab^2 = sqrt25 x sqrta^2 x sqrt b^2 = 5 horizonal line ab horzonal line
sqrt 50x^2
I get sqrt50 x sqrt x^2 = 50 horizonal line x horzonal line or is this right
sqrt 25times2 = 25sqrt x 2sqrt = 5sqrt2
6sqrt7 x 3 sqrt5
I get (6 x 3) (sqrt& x sqrt5) = 18 sqrt35
3sqrt2 + sqrt50
I get 3(sqrt52) or do I have to simplify the sqrt50 down further

Click here to see answer by Earlsdon(6291)

Question 203195: I need help rationalizing....
9 times the cubic root 2 over/divided by the cubic root 5 minus cubic root 2.
Please help! Soory my keyboard will not allow me to type the equation.
Click here to see answer by jim_thompson5910(28598)

Question 203301: find three consecutive odd integers such that the sum of the smallest and 7 times the largest is 68
Click here to see answer by RAY100(1637)

Question 203537: Find the lengh of one side of a square field whose area is 50 meters square.
Click here to see answer by rfer(12678)

Question 203538: √(3/2) - √(2/3)
I dont get this i tried and i get √(30)/6 but the answer says its wrong.
Click here to see answer by checkley77(12569)

Question 203547: The side of an equilateral triangle are each s units long. Find the altitude (h) in terms of s. Write the answer in simplest radical form.
Click here to see answer by Earlsdon(6291)

Question 203539: √(2/5) + √(10)
Is (2√(65)/5) right?
Click here to see answer by scott8148(6628)

Question 203898: 2 times the sq root of 90 + 3 times the sq root of 40 - 4 times the sq root of 10 = ??
Click here to see answer by lazi(15)

Question 203858: What is the square root of 24m21n51?
Click here to see answer by Alan3354(30993)

Question 204703: radical equation 3rd root of x minus 4 = 0
Click here to see answer by stanbon(57424)

Question 204609: Add or subtract. Then simplify by collecting like radical terms, if possible.
21sqrt5 - 13sqrt5
Click here to see answer by checkley77(12569)

Question 204607: Simpligy br factoring:
sqrt 245k^7q^8
Click here to see answer by checkley77(12569)

Question 204595: simplify (4-2i)(3-3i)
Click here to see answer by checkley77(12569)

Question 205049: I need help figuring out (2+the square root of 3)(3-the square root of three)
Calculators did not help solve the answer. I tried the foil method but I am getting stuck on how to foil square roots.. Please help me. I would appreciate it very much.
Click here to see answer by nerdybill(6963)

Question 205169: Id have a question; I should find out what the possible rational roots of x^3 - 4x^2 + 2x + 1 are, I am not sure if 3.303, -0.303, 1 are right and
I totally dont understand how to use synthetic substitution, to find out which of the possible rational roots are actually a root of the equation. Could someone please help me with this?
Click here to see answer by Alan3354(30993)

Question 205460: The question is as followed:
Without the use of a calculator explain how in the olden days they used to evaluate the following.
Square Root of Two (2) √2
Square Root of Seven (7) √7
" " " Thirteen (13) √13
" " " One Hundred and sixty nine (169) √169
I'm unsure where to ever start with this.
Click here to see answer by jim_thompson5910(28598)

Question 205589: The question is: Simplify: (3 times the square root of 5)^3
what i did so far was wrote the whole equation out. As (3 times the square root of 5) 3 times. Then i multiplied 3, 3 times to get 27. then i multiplied 5, 3 times to get 125. I don't know what to do next. This is a multiple choice question. The choices are: 15, 125, 5, and 5,-5.
Click here to see answer by Alan3354(30993)

Question 205597: This is a 3 part question but i already answered the first part on my own. The other two parts are to Simplify: the square root of 44 and the square root of 11 over 16
Click here to see answer by stanbon(57424)

Question 205652: solve -9 square root of 400 x to the 4th y to the 2nd
Click here to see answer by Targetweek(62)

Question 205706: x to the 3/2th power = 27
Click here to see answer by RAY100(1637)

Question 205164: Could someone please help me out with this problem; which are the possible rational roots of x^3-4x^2+2x+1=0? using the synthetic substitution, which of the possible rational roots is actually a root of the equation?
My brains dont seem to work right when it comes to roots =(
Click here to see answer by stanbon(57424)

Question 205925: cube root of 2 plus square root of 3, what is the answer?
Click here to see answer by Alan3354(30993)

Question 205979: There are four problems I need help with.
Solve algebraically.
1. cuberoot(x)-5=3
2.x^3/2=27
3.3/4=1-3x-2/x+1
Sove algebraically and check your potential solutions.
4.square root of x+2-x=0
Click here to see answer by stanbon(57424)

Question 206004: Given that log[a]5=0.8271 and log[a]20=1.5395 fing log[a]4
Click here to see answer by Edwin McCravy(8924)

Question 206036: There are two questions to this, but I believe I answered the first part correctly.
1a.)Suppose that N=sqrt x+2 models the number of cases of an infection, in millions, of a disease x years from now.
How many cases of the infection will there be 16 years from now?
My answer is: N=sqrt x+2
sqrt(16)=4
sqrt(16)+2=6
6 million cases in 16 years.
1b)In how many years will there be 7 million cases?
Part b is what I need help with. Will you please show me this step by step?
Thank you for your help.
Click here to see answer by Earlsdon(6291)

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