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What is the correct description of the graph of (3x+8y=20) and (7x+13y=34)?

Answer and explanation

Correct answer: Lines intersecting at one point

The ratios of the coefficients of x and y are 3/7 and 8/13, respectively, and they are unequal. Thus, a₁/a₂ ≠ b₁/b₂, so the two lines intersect at exactly one point and the pair has a unique solution. Option B is incorrect because distinct parallel lines require a₁/a₂ = b₁/b₂. Exam tip: Compare the ratios of the coefficients of x and y first to determine the relationship between the lines.

Related tags

Linear EquationsGraphical SolutionSolvability ConditionsIntersecting LinesConditions For SolvabilityPair Of Linear Equations In Two VariablesMathematicsClass 10 Mcq

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