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If (L(t)=7t+41), what is (L(6t)-L(2t))?

Answer and explanation

Correct answer: \(28t\)

Given \(L(t)=7t+41\), substitute \(6t\) for \(t\): \(L(6t)=7(6t)+41=42t+41\). Similarly, \(L(2t)=7(2t)+41=14t+41\). Therefore, \(L(6t)-L(2t)=(42t+41)-(14t+41)=28t\). \(42t\) is part of \(L(6t)\), not the difference. Exam tip: Use brackets while subtracting function values so that constant terms and signs are handled correctly.

Related tags

PolynomialsLinear FunctionsFunction SubstitutionAlgebraic SimplificationLinear GrowthLinear Growth And DecayIntroduction To PolynomialsMathematics

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