Tutors Answer Your Questions about Radicals (FREE)
Question 39357: I found a problem in a text book, but I wanted to know if I was correct in determining that there was no solution to the problem.
The problem is the cuber root of X=x-6; the book I found stated that the answer was 8, but I have tried every approach to solve this problem and maybe I am missing a step.
I tried to take the difference of two cubes and set the equation equal to zero, but that didn't work. I also expanded the equation and set it equal to zero, but that didn't work either. I don't know how they came up with the answer 8, but I hope you can help.
Click here to see answer by stanbon(75887)  |
Question 39373: Rationalize the denominator of each radical expression. Assume all variables represent nonnegative numbers and that no denominitors are 0.
1 + Square root 3
__________________
3 Square root of 5 + 2 Square Root 3
Click here to see answer by Nate(3500) |
Question 39600: This is a problem from a textbook that I just do not understand how to solve. I have been reading it over and over and still don't get it. Can you please help?
Sailboat speed. The sail area-displacement ratio S provides a measure of the sail power available to drive a boat. For a boat with a displacement of d pounds and a sail area of A square feet S = 16Ad^-2/3
a) Find s to the nearest tenth for the Tartan 4100, which has a sail area of 810 square feet and a displacement of 23,245 pounds.
b) Solve the formula for d.
Click here to see answer by Earlsdon(6294) |
Question 37099: A.
Is (square root x)^2=x an identity (true for all nonnegitive values of x)?
please explain answer
B. For the equation x-2sqrtx=0, perform the following:
solve for all values of x that satisfies the equation
answer & show work
C. graph the functions y=x and y=2 sqrt x on the same graph as B.(by plotting points if necessary) Show the points of intersection of these two graphs.
Also could you look at this? I think I have it right but I wanna double check
A right triangle is a triangle with one angle measuring 90 degrees. In a right triangle, the sides are related by Pythagorean Theorem, c^2=a^2+b^2, where c is the hypotenuse (the side opposite the 90 degree angle). Find the hypotenuse when the other two sides' measurements are 6 feet and 8 feet.
so heres what I have:
c^2=6^+8^2
c^2=36+64
sqrt c^2= sqrt 100 c= 5 sqrt 4
Click here to see answer by venugopalramana(3286) |
Question 39755: Please help, I need to find the lengths of the sides of a triangle with the given vertices, round to the nearest 10th if needed.
A(2,2),B(6,3),C(5,6)
and
R(-2,2),S(1,1),T(-3,-3)
Thank You very much for your help,
Christian
Click here to see answer by askmemath(368) |
Question 39954: Please tell me if I'm doing this right!
The instructions are to simplify the radical expression.
The problem is (sqrt3 + 5)(sqrt3 - 3)
Using the foil method I come up with:
sqrt3 * sqrt3 -3sqrt3 + 5sqrt3 - 15
= 3 - 3sqrt3 + 5sqrt3 - 15
= -12 + 2sqrt3
Is this right and does it need (or can it be) simplified further?
Thanks
Click here to see answer by Nate(3500) |
Question 39964: Help with this one please!
sqrt2y+7 + 4 = y
I think I have to start by isolating the y to one side - is that right, and then do I subtract the 4 from both sides to cancel it out on the left?
Please show me how to figure this!
Click here to see answer by stanbon(75887) |
Question 39964: Help with this one please!
sqrt2y+7 + 4 = y
I think I have to start by isolating the y to one side - is that right, and then do I subtract the 4 from both sides to cancel it out on the left?
Please show me how to figure this!
Click here to see answer by Earlsdon(6294) |
Question 39955: I am having a hard time with my Algebra One class. I know this is a bad example of a question but I need help with Simplifying Radicals--Even Exponents and also adding, subtracting, and Multiplying Radicals. I don't know how to write you a question with the mathematical signs I need. I am having the most difficult year in school this year and I was wondering if there was any possible way you could help me out?
Thanks for your time.
Stephanie
Click here to see answer by askmemath(368) |
Question 40531: Please help me solve this.
I need to find the altitude of a triangle.
The bottom is 10, the two sides going up to the point are 13. I cannot figure out how to do this.
I tried sqrt13^2 = sqrt13^2 + sqrt10^2
= 169 = 169 + 100
But I don't think this is right. I tried another problem similar to it that I have the correct answer to and I cannot come up with that answer so I know I'm not doing this one right. Please help!
Click here to see answer by Nate(3500) |
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