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

If (C(t)=260-8t) and (D(t)=180-15t), how does (C(t)-D(t)) change?

Answer and explanation

Correct answer: It increases by 7 for each 1-unit increase in t

Find the difference: \(C(t)-D(t)=(260-8t)-(180-15t)=80+7t\). The coefficient of \(t\) is \(+7\), so the difference increases by 7 for every 1-unit increase in \(t\). Option B results from a sign error: \(-8t-(-15t)=-8t+15t=+7t\), not \(-7t\). Exam tip: when subtracting an expression, change the signs of every term in the second expression.

Related tags

Linear FunctionsPolynomial SubtractionRate Of ChangeLinear DecayAlgebraic ExpressionsLinear Growth And DecayIntroduction To PolynomialsMathematics

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.