X is defined as 50 - of 30 - Then find the value of x 2-5 x -220A- 78B- 86C- 90D- 80

The correct option is D 80 50% of 30 = 50/100× 30 = 15 Putting x = 15 in x^2 + 5x 220 we get : 15^2 + 5(15) 220 = 225 +75 220 = 300 220 = 80 = 80 ...

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$x$ is defined as 50% of 30. Then find the value of $x^{2} + 5 x - 220$

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