Update

Muft Shiksha™ एक 100% Free Education Portal है 🇮🇳, जिसका उद्देश्य Class 9–12 के हर विद्यार्थी तक High-Quality Education को पूरी तरह मुफ्त पहुँचाना है। 🇮🇳 हम मानते हैं कि अच्छी शिक्षा किसी student की आर्थिक स्थिति पर निर्भर नहीं होनी चाहिए। 🇮🇳 हर विद्यार्थी को वही Quality Study Material, MCQs, Quizzes, Exam Preparation, Concept-Based Learning और Bilingual Support मिलना चाहिए, जो आमतौर पर महंगी Coaching या Premium Platforms में मिलता है। Muft Shiksha™ 🇮🇳 इसी सोच के साथ बनाया गया है

Subjects
0 reads0 ratings0 helpful

What is s for infinitely many solutions of 12x + sy = 18 and 20x + 10y = 30?

Answer and explanation

Correct answer: s = 6

For infinitely many solutions, the ratios of corresponding coefficients and constants must be equal. In the equations 12x + sy = 18 and 20x + 10y = 30, the ratio of x-coefficients is 12/20 = 3/5, and the ratio of constants is 18/30 = 3/5. Therefore the y-coefficient ratio must also be 3/5: s/10 = 3/5. Multiplying by 10 gives s = 6. With s = 6, the first equation is three-fifths of the second, so the two equations represent the same line and have infinitely many common solutions. Hence option C is correct. If s were 4, 5, or 8, the y ratio would differ from 3/5, so the equations would not be coincident and could not have infinitely many solutions.

Related tags

Linear EquationsInfinitely Many SolutionsCoefficient RatiosConditions For SolvabilityClass 10 MathematicsPair Of Linear Equations In Two VariablesMathematicsClass 10 Mcq

Was this question useful?

No ratings yetWrite a review / Rate this question

Student Reviews

No published reviews yet.

Add Muft Shiksha to your Home Screen

In Safari, tap Share, then Add to Home Screen.