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What should (s) be for (2x+5y=17) and (4x+10y=s) to be consistent and dependent?

Answer and explanation

Correct answer: 34

For a pair of consistent and dependent linear equations, the corresponding coefficients and constants must be proportional, giving infinitely many solutions. Here, multiplying the first equation by 2 gives \(2(2x+5y=17)\), or \(4x+10y=34\). Therefore, \(s=34\), so option C is correct. If \(s\) were 33 or 35, the equations would not represent the same line and would not be dependent. Exam tip: For dependent equations, check \(\frac{a_1}{a_2}=\frac{b_1}{b_2}=\frac{c_1}{c_2}\).

Related tags

Pair Of Linear EquationsConsistent EquationsDependent EquationsConditions For SolvabilityParameterPair Of Linear Equations In Two VariablesMathematicsClass 10 Mcq

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