Algebra

1.Simplify the radical expression.
√5+6√√5

A.5√5
B.7√10
C.7√5
D.5√10

2.Simplify the radical expression.
2√6+3√96

A.14√6
B.14√96
C.5√96
D.50√6

3.Simplify the radical expression.
(8+√11)(8-√11)

A.53
B.75+16√11
C.-57
D.64+√11

4.What is the domain of the function?
Y=√3+3

A.x≤-1
B.x>1
C.x≥-1
D.x<1

I think the answers are
1.C
2.A
3.A
4.C
Please correct me if I'm wring, I'm having trouble understanding and completing these four questions

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  1. 1-3 are correct.
    I don't see the x in #4

    You would chose your x, so the value on the radical sign would never be negative. It would have to be > or equal to zero.

    If your question is square root of (3 +3x)

    then you want this expression to be equal to or greater than zero.

    3 +3x > or = 0
    x> or = = -1

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  2. sorry. For #4 the correct question is.

    4.What is the domain of the function?
    Y=¡Ì3x+3

    A.x¡Ü-1
    B.x>1
    C.x¡Ý-1
    D.x<1

    I now think the answer for #4 is B. Am I correct?

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