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

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Question 408306: solve the equation by completing the square
x^2-12x=5 show work step by step;
also
(x-3)^2=36
Click here to see answer by richard1234(7193)

Question 408751: The weight of an object on Earth varies according to the elevation of the object. In particular, the weight of an object follows this equation w=Cr^-2, where C is constant and r is the distance that the object is from the center of the earth.
Solve the equation w=Cr^-2 for r.
I am not sure where to start with this equation and no numbers to input the next problem states that sea level is 3,963 miles from center of the earth but I don't think I need to use that to solve for r in the first question. Please help!
Click here to see answer by richard1234(7193)

Question 408465: √(1+4√(x))=1+√(x)
Click here to see answer by jsmallt9(3758)

Question 409016: please help with 3n^2-75=0

Click here to see answer by scott8148(6628)

Question 409283: How do i find the root -sqrt ( 25 )
Click here to see answer by jim_thompson5910(35256)

Question 410510: Is this equation 28 � (4sq rt 2) = 24(sq rt 2) true or false?
Click here to see answer by Theo(13342)

Question 410707: I need help on how to solve this problem:
Find the inverse function:
1. 4x-2y=8
Click here to see answer by stanbon(75887)

Question 411154: radiclas solve the extraneous solutions
Click here to see answer by Alan3354(69443)

Question 411171: Solve the following equation
2x^2+8x+5=0
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Question 411172: Solve the following equation
(2x+3)(x+4)=1
Click here to see answer by solver91311(24713)

Question 411172: Solve the following equation
(2x+3)(x+4)=1
Click here to see answer by MathLover1(20849)

Question 411153: i dont kno whst to do but i can try to do it but get a confusing answer i need help alg b 11.3 solving radicals
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Question 411170: Solve the equation
√5x-5 = √3x-7
Click here to see answer by edjones(8007)

Question 411439: Simplify:
5 radical 243

Click here to see answer by rfer(16322)

Question 412039: Rationalize the denominator (1)/(6-sqrt(6))
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Question 412583: i need the answer to
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Question 412606:
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Question 412716: Factoring:
1. A farmer has 300 ft of fencing and wants to enclose a rectangular area of 5000 ft2. What dimensions should she use? (Hint: 5000 = 30 * 100)
A=5000 W=? L=? H=?
A= W*L*H
I know that we're supposed to put all of the numbers to one side and equal them to zero. Ex: 2(x+1)=0 ==> x=-1
Click here to see answer by checkley79(3341)

Question 413037:
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Question 413019:
Click here to see answer by josmiceli(19441)

Question 413338: What is the Pythagorean theorem ? How is it used?
Click here to see answer by algebrahouse.com(1659)

Question 413609: 3 over radical 32
Click here to see answer by jim_thompson5910(35256)

Question 413609: 3 over radical 32
Click here to see answer by ewatrrr(24785)

Question 413958: simplify expression assume all variables are positive real numbers the square root of y^5 over y they are both under the radical
Click here to see answer by ewatrrr(24785)

Question 413953: simplify the expression. Assume all variables are positive real numbers
the 3rd root of r^17? I think it would be the 3rd root of r^2 because you can take out 5 sets of r but I'm not sure.
Click here to see answer by jsmallt9(3758)

Question 413641: (1 - (SQRT(3))/3)/(1 + (SQRT(3))/3)
Click here to see answer by jsmallt9(3758)

Question 414097: Answer the following questions. Use Equation Editor to write mathematical expressions and equations.
Hint for this assignment: Pay attention to the units of measure. You may have to convert from feet to miles 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. Solve the equation for C. Solve the equation for w.
b. Suppose that an object is 420 pounds when it is at sea level. Find the value of C that makes the equation true. (Sea level is approximately 4,000 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
i. 1,200 feet below sea level
ii. The top of Mt McKinley (20,500 feet above sea level)
2. The equation gives the distance, D, in kilometers that a person can see to the horizon from a height, h, in meters.
a. Solve this equation for h.
b. Mount Evans in the Rocky Mountain National Park, is 4,385 meters in elevation. How far can you see to the horizon from the top of Mount Evans? Can you see Cheyenne, Wyoming (about 260 kilometers away)? Explain your answer.

Click here to see answer by jsmallt9(3758)

Question 414090: Please help with this mulitply or divide the radical expressions the answer should be simplified radical the third root of 5w * the 4th root of 5w?
Click here to see answer by jsmallt9(3758)

Question 414440: 5
divided by
4 minus the square root of 3
Click here to see answer by stanbon(75887)

Question 414466: Please help me solve its multiply or divide the radical expressions answer should be written as a simplified radical the third root of q-1 over the fourth root of q-1
Click here to see answer by stanbon(75887)

Question 414465: Please help me solve this I have to solve for V: r= the square root of V over h pie
Click here to see answer by Alan3354(69443)

Question 414463: Please help me solve this equation: 2 square root 3-w and -w out of the radical = 0 I squared both sides to get rid of radical and it left me with 4*3-w=0+w squared. Now I'm stuck I'm not sure what to do now.
Click here to see answer by solver91311(24713)

Question 414588: y= 16.3 squrt 4+23
Click here to see answer by jsmallt9(3758)

Question 414519: sqrt(-3-4n - sqrt(-2-2n = 1
Click here to see answer by jsmallt9(3758)

Question 414972: Find the exact area of a triangle with
a base of
30 meters and a height of
6 meters.
Click here to see answer by praseenakos@yahoo.com(507)

Question 415615: Please help me solve this equation:
Click here to see answer by stanbon(75887)

Question 415620: Please help me solve this equation:
Click here to see answer by mananth(16946)

Question 415623: Please help me solve this equation:
Click here to see answer by ewatrrr(24785)

Question 415817: P=1500sqrt(t)+Po...population is 10,000. What the steps to solving this kind of problem?
ex.T=0(2010)Po=? etc.
Click here to see answer by htmentor(1343)

Question 415866: radical 18x + radical 2x
Click here to see answer by jim_thompson5910(35256)

Question 415980: how is adding radicals similar to combining like terms
Click here to see answer by praseenakos@yahoo.com(507)

Question 416053: Solve for x & y
x/2 + y/2 = 9 and
sqrt of xy = 7.2
Click here to see answer by mananth(16946)

Question 416314: The pendulum of a grandfather clock is ( 32/π^2 )ft long. How long does it take to swing from one side to the other?
Click here to see answer by htmentor(1343)

Question 416773: For each pair of functions, find f(g(x)) and g(f(x)).
F(x)=3x,g(x)=x^2
Click here to see answer by Gogonati(855)

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