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

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Question 119883: Hi Tutors, Can someone see if I did this problem right and if not can you tell me what I did wrong. Solve the equations.

sqrt 4x + 1 + 3 =0
sqrt 4x + 1 = -3
sqrt 4x + 1^2 =(-3)^2
4x + 1= 9
4x = 9 – 1 Subtract
4x = 8 Divide by 2
x= 2 is the answer
How can I check to see if this is the right answer.

One more thing I am stuck on this problem because of the x can someone please help.
sqrt 2x + 1 + x = 7
Click here to see answer by josmiceli(9697)

Question 120341: What is the answer to radical 36r^2s if you have to simplify it.
Click here to see answer by jim_thompson5910(28598)

Question 120343: What is the answer to radical 36r^2s if you have to simplify it.
Click here to see answer by jim_thompson5910(28598)

Question 120492: The time in seconds it takes for an object to fall from rest is given by t = 1/4squared s, in which s is the distance fallen. What is the time it takes an object to fakk from a building 1400 feet high? I have tried 1/4 the distance fallen squared, and I just don't know how to figure this one out in seconds?
Click here to see answer by solver91311(16897)

Question 120559: simplify the expression
a)square root of 45
b)square root of 54
c)square root of 16/25
d)square root of 10/32
Click here to see answer by jim_thompson5910(28598)

Question 120564: WORDSEARCH
7. IF THE SQUARE ROOT OF N IS AN INTEGER WHAT IS N (13 LETTERS LONG)
11) EVERY POSITIVE # HAS ONE OF THESE (8 LETTERS LONG)
Click here to see answer by jim_thompson5910(28598)

Question 120471: solve. sqrt x-1=x-3
Click here to see answer by nabla(475)

Question 120605: simplify (7-a/b)/(14/b)
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Question 120702: Find the perimeter of the triangle in the figure.
One side 4
Other Side: Radical Sign 5 - radical sign 3
Other Side: Radical sign 5 + radical sign 3
Thanks

Click here to see answer by nabla(475)

Question 120762: A very pleasant evening to you Math Solvers! I am encountering some difficulties about radicals, can you please help me. In my problems it is specified that you just need to simplify the following by reducing as much as possible, here it follows:
->fifth root of 486
Thank you very much!!!
Click here to see answer by bucky(2189)

Question 120773:
sqrt75a^2/sqrt3
Click here to see answer by checkley71(8403)

Question 120760: A very pleasant evening to you Math Solvers! I am encountering some difficulties about radicals, can you please help me. In my problems it is specified that you just need to simplify the following by reducing as much as possible, here it follows:
->square root of 64 a^6 b
Thank you very much!!!
Click here to see answer by praseenakos@yahoo.com(507)

Question 120797: Write the equation of the line passing through (-1,7) and (-1,1)
Click here to see answer by checkley71(8403)

Question 120795:
solve (x-2)^2=10
Click here to see answer by checkley71(8403)

Question 120759: A very pleasant evening to you Math Solvers! I am encountering some difficulties about radicals, can you please help me. In my problems it is specified that you just need to simplify the following by reducing as much as possible, here it follows:
-> square root of 200 a b^2
Thank you very much!!!
Click here to see answer by stanbon(57379)

Question 120761: A very pleasant evening to you Math Solvers! I am encountering some difficulties about radicals, can you please help me. In my problems it is specified that you just need to simplify the following by reducing as much as possible, here it follows:
->cube root of 1000 x^6 y^5
Thank you very much!!!
Click here to see answer by jim_thompson5910(28598)

Question 120818: m/m^2
Click here to see answer by josmiceli(9697)

Question 120817: 3 13/3
Click here to see answer by jim_thompson5910(28598)

Question 120816: 6/7*3/5
Click here to see answer by checkley71(8403)

Question 120815: 6/7*3/5
Click here to see answer by checkley71(8403)

Question 120909: I need help with this word problem, I've tried everything, but can't get a real answer:
The altitude of a triangle is 8cm longer than the base. If the area of a triangle is 24cm, find the altitude.
Click here to see answer by checkley71(8403)

Question 120976: -9(x-3)^2=-7, can someone please help me I dont understand how to do this one. Thank you in advance!
Click here to see answer by edjones(7569)

Question 121078: The time in seconds that it takes for an object to fall from
rest is given by t=1/4 (radical)s, in which s is the distance fallen. Find the time required
for an object to fall to the ground from a building that is 800 ft high.
Science and medicine. Find the time required for an object to fall to the ground
from a building that is 1400 ft high. (Use the formula found in above problem)
I think I get this but not sure, please help, thanks.
Click here to see answer by ankor@dixie-net.com(15660)

Question 121108: Simplify by combining like terms
(rad)63) -2(rad)28) +5(rad)7 i thought i had it then i didnt please help.
Also am i entering the radical thing the right way? radical of 63 = (rad)63 ? is this ok?
Click here to see answer by josmiceli(9697)

Question 121113: A garden area is 30ft long and 20ft wide. A path of uniform width is set around the edge. If the remaining garden area is 400ft, what is the width of the path?
400 = 30^2 x 20^2
400 = 900 x 400
400 = 36,000
Am I on the right track for the kind of problem?
Click here to see answer by ankor@dixie-net.com(15660)

Question 121119: Subtract with answer in simplist form.
7/y-8 - 1/y+1
would the answer be - 6/7 ?
Click here to see answer by stanbon(57379)

Question 121204: Simplify: m^3/7/m^6/28
Click here to see answer by jim_thompson5910(28598)

Question 121397: 3+ sqrt (x^2-8x)=0
Thank you
Click here to see answer by algebrapro18(206)

Question 121572: How do I solve each equation and check the solutions. I'm sorry I don't have any textbook information:
3 square root 2z = 9
square root 2x-1 = x-7
Click here to see answer by Fombitz(13828)

Question 121721: I've tried to find these two questions and can't seem to find them. I tried to register in the students section but registered in the tutor's section. Sorry, I definitely am not trying to become a tutor. My questions:
squared 2y + 7 + 4 = y
Insulation comes in 40cm rolls that are cut to fit between the rafters in the attic. If the roof is 7m from peak to eave and the attic space is 3m high at the peak, how long does each of the pieces of insulation need to be, round to the nearest tenth. I'm sorry, i don't have the ISBN.
Click here to see answer by stanbon(57379)

Question 121898: math solver,i have three questios for you, please solved them for me and show how you did it,forever in your debt. each must be solved algebraically,thanks
and yes there all are college alebra questios,which is driving me nuts
(1) 3 squt x-5 =3
(2) x3/2 =27
(3)3/4 =1-3x -2 over x +1
Click here to see answer by stanbon(57379)

Question 121916: P1=(2,-5)
P2= (5,4)
d(P1,P2)=
answer using radical as needed
Click here to see answer by jim_thompson5910(28598)

Question 122003: Evaluate 4*sqrt81, if possible. The sqrt of 81 is 9 so would it be 4*9=36?
Click here to see answer by checkley71(8403)

Question 122013: Simplify squared root 7*squared root 14
I wish I had a scientific calculator to help me with these problems.

Click here to see answer by MathLover1(6634)

Question 122063: Simplify by combining like terms x(rad18) -3(rad8x^2) i think i got it but want to be sure is x=3/5?
Click here to see answer by tutor_paul(490)

Question 122088: I have no idea how to do this problem:

Click here to see answer by checkley71(8403)

Question 122088: I have no idea how to do this problem:

Click here to see answer by Edwin McCravy(8909)

Question 122011: Simplify: square root 72 - square root 2
Click here to see answer by checkley71(8403)

Question 122119: How do I solve 3+ (square root of) x^2-8x = 0 ? Please note I do not know how to put the square root sign, but x^2-8x is under the square sign.
Click here to see answer by scott8148(6628)

Question 122218: this is from college algebra using radicals andrational numbers,my question is this and please show how you did it.
suppose that n =sqt root x +2 models the number of cases of an infection, in millions, of diseases x years from now.
approximately how many cases of the infection will there be 16 years from now?
IN APPROXIMATELY HOW MANY YEARS WILL THERE BE 7 MILLION CASES?
PLEASE HELP AND THANK YOU.
Click here to see answer by edjones(7569)

Question 122284: x4 – 3 x2 + 2 = 0.
Explain how one can use the quadratic formula to solve this equation by using a change of variable. Solve this equation completely.

Click here to see answer by jim_thompson5910(28598)

Question 122286: How would you solve the equation
(sqrt(sqrt(2 x+1+x=1)) ?
Explain every step in reaching your conclusion.

Click here to see answer by psbhowmick(529)

Question 122339: The volume of a cube is given by V = s3, where s is the length of a side. Find the length of a side of a cube if the volume is 800 cm3. Round the answer to three decimal places.
I took 3square root of 800 and the solution I came up with was
266.66?
Click here to see answer by Earlsdon(6287)

Question 122544: 5-(2/x-6)=10-2x/x-6
Click here to see answer by Fombitz(13828)

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