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Question

x is defined as 30% of 30. If y=x2+4x+7, find the value of 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 A 124

30% of 30=30100×30=9

Putting x=9 in the equation of y
y=x2+4x+7
y=92+4(9)+7
y=81+36+7
y=124


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