anonymous
  • anonymous
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.
Mathematics
katieb
  • katieb
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Vocaloid
  • Vocaloid
all sides of a square are equal so 2x + 1 = x +2 solve for x
anonymous
  • anonymous
3
Vocaloid
  • Vocaloid
not quite, 2x + 1 = x + 2 subtract x from each side first, what do we get?

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anonymous
  • anonymous
x+1=2
Vocaloid
  • Vocaloid
right, now subtract 1 from each side
anonymous
  • anonymous
x=1
hybrik
  • hybrik
yes
Vocaloid
  • Vocaloid
good, so x = 1 now, we know that one of the sides is x+2 if x = 1, then (x+2)^2 = ?
hybrik
  • hybrik
now plug in one into X
hybrik
  • hybrik
(2(1)+1)(1+2)
hybrik
  • hybrik
(2+1)(1+2) = (3)(3) = A
anonymous
  • anonymous
9
hybrik
  • hybrik
Correct!
hybrik
  • hybrik
9[B]

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