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For prices of two items, the equations (6x+5y=240) and (12x+10y=490) are formed. What type of system is this?

Answer and explanation

Correct answer: Inconsistent

Here, \(a_1/a_2=6/12=1/2\), while \(b_1/b_2=5/10=1/2\) and \(c_1/c_2=240/490=24/49\). Thus, \(a_1/a_2=b_1/b_2\neq c_1/c_2\), so the two lines are distinct and parallel and have no common solution. Therefore, the system is inconsistent. It is not consistent and dependent, because that case requires all three ratios to be equal and gives infinitely many solutions. Exam tip: Compare all three corresponding ratios in such questions.

Related tags

Pair Of Linear EquationsConditions For SolvabilityInconsistent SystemRatio CriterionClass 10 MathematicsPair Of Linear Equations In Two VariablesMathematicsClass 10 Mcq

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