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Question

If x=30% of 30 and y=x2+4x+7
then y = ___.


  1. 143
  2. 124
  3. 142
  4. 134


Solution

The correct option is B 124

x=30% of 30=30100×30=9

Substituting, x=9 in  y=x2+4x+7, we get

 y=(9)2+4(9)+7=124

 y=124

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