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Which of the following points lies in the solution region of (x+2y>8)?

Answer and explanation

Correct answer: ( (3,3) )

A point belongs to the solution region only if its coordinates make the inequality true. For each option, substitute its x- and y-values into \(x+2y>8\). At (2,3), the left side is 2+6=8, so it fails because the inequality is strict. At (5,1), the value is 7, so it fails. At (3,3), the value is 3+6=9, which is greater than 8. Thus choice C is correct.

The point (0,4) gives 0+8=8, which is also only on the boundary and is not included in a strict inequality. The boundary line is \(x+2y=8\); points satisfying the equality lie on that line, while the required region contains only points giving a value greater than 8. Therefore (3,3) is the only listed point in the solution region.

Related tags

Linear InequalitiesGraphical SolutionClass 11

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