Algebra 1

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1. (3.0 X 10^2) x (2.0 X 10^6)
I said 6 X 10^8

2. what is the area of a square with the dimension of 1+ ã 2?
I don't know this one

3. Simplify: 2ã 4 + 2ã 8.
I said 10

4. Simplify: 2ã 4 + ã 4
I said 6

5. 5ã 4 x ã 8
----------------
ã 8 X ã 2
I said 10.

6. ã y= 5 + ã 2
-------------
2
I said y= 2.5

Are these right?

  • Algebra 1 -

    I will assume you intended your
    ã to come out as √

    1. is correct, I would write it as
    6.0 x 10^19

    2. area = (1 + √2)^2
    =1 + 2√2 + 2 = 3 + 2√2

    3. 2√4 + 2√8
    = 2(2) = 2(2√2)
    = 4 + 4√2

    4. correct

    5.
    (5√4)(√8)/(√8(√2)
    = 5√40/√16
    = 5(2√10)/4
    = 5√10/2

    √y = 5+√2
    square both sides
    y = (5+√2)^2 = 25 + 10√2 + 2 = 27 + 10√2

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