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What is the correct description of the graph of the equations (3x+13y=41) and (8x+29y=91)?

Answer and explanation

Correct answer: Lines intersecting at one point

For a pair of linear equations, if \(\frac{a_1}{a_2} \ne \frac{b_1}{b_2}\), the two lines intersect at exactly one point, so the pair has a unique solution. Here, \(\frac{3}{8} \ne \frac{13}{29}\); therefore, the lines intersect at one point. Distinct parallel lines would require \(\frac{a_1}{a_2}=\frac{b_1}{b_2}\ne\frac{c_1}{c_2}\), which is not true here. Exam tip: compare the ratios of the coefficients of \(x\) and \(y\) first.

Related tags

Pair Of Linear EquationsConditions For SolvabilityGraph Of LinesUnique SolutionIntersecting LinesPair Of Linear Equations In Two VariablesMathematicsClass 10 Mcq

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