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Question

x is defined as 30% of 30. y=x2+4x+7, then what is y?

A

142

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B

134

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C

143

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D

124

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Solution

The correct option is D

124


x=30.
Substituting for x = 9 in y =x2+4x+7, we get
y=(9)2+4(9)+7=81+36+7=124

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