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anonymous

  • one year ago

What is the area of a square with sides of lengths 2x+1 and x+2? (A) 1 (B) 9 (C) 16 (D) 25 (E) It cannot be determined from the information given.

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  1. Vocaloid
    • one year ago
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    all sides of a square are equal so 2x + 1 = x +2 solve for x

  2. anonymous
    • one year ago
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    3

  3. Vocaloid
    • one year ago
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    not quite, 2x + 1 = x + 2 subtract x from each side first, what do we get?

  4. anonymous
    • one year ago
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    x+1=2

  5. Vocaloid
    • one year ago
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    right, now subtract 1 from each side

  6. anonymous
    • one year ago
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    x=1

  7. hybrik
    • one year ago
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    yes

  8. Vocaloid
    • one year ago
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    good, so x = 1 now, we know that one of the sides is x+2 if x = 1, then (x+2)^2 = ?

  9. hybrik
    • one year ago
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    now plug in one into X

  10. hybrik
    • one year ago
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    (2(1)+1)(1+2)

  11. hybrik
    • one year ago
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    (2+1)(1+2) = (3)(3) = A

  12. anonymous
    • one year ago
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    9

  13. hybrik
    • one year ago
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    Correct!

  14. hybrik
    • one year ago
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    9[B]

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