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Algebra/Algebra 2 Square roots and radicals

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Question
I am having trouble with these problems if you could help that would be great

Well here they are
1: Simplify
1/ Cuberoot of 64


2: Simplify

√3   √27
-- + ---
√4   √4

3:  Simplify
(√7-√2)Squared

4: Solve for X
____
√2x+5 - 1 = x

That is all. If you could solve these or show me how to solve them that would great

Answer
1. 64^1/3 = 4 so your answer is 1/4
2. 27^1/2 = 3(3^1/2) so you have 4(3^1/2)/2 = 2(3^1/2)
3. Do you know how to expand (a-b)^2?   It's the same thing and you get 7 -2(14^1/2)+2 =
9 -2(14^1/2)  
4. rewrite it (2x+5)^1/2 = x+1
square both sides to get 2x+5 = x^2+2x+1 or 4 = x^2 so x = +/-2

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