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Which is the intersection point of (2x+5y=20) and (y=2)?

Answer and explanation

Correct answer: \((5,2)\)

An intersection point must satisfy both line equations. Substituting \(y=2\) into \(2x+5y=20\) gives \(2x+5(2)=20\), or \(2x+10=20\). Thus \(2x=10\) and \(x=5\). Therefore, the intersection point is \((5,2)\). The point \((2,5)\) has \(y=5\), so it cannot lie on the line \(y=2\). Exam tip: Substitute the fixed variable from one equation into the other equation.

Related tags

Linear InequalitiesIntersection Of LinesCoordinate GeometrySubstitution MethodHorizontal LineClass 11 MathematicsGraphical Solution Of Linear Inequalities In Two VariablesMathematics

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