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If (A(t)=20+4t) and (B(t)=35+3t), at what (t) will (A(t)) be (5) more than (B(t))?

Answer and explanation

Correct answer: \(t=20\)

“\(A(t)\) is 5 more than \(B(t)\)” means \(A(t)=B(t)+5\). Thus, \(20+4t=35+3t+5\), which gives \(t=20\). At \(t=18\), the difference is only \(3\), so it is close but not correct. Exam tip: In “more than” questions, first write the difference as \(A(t)-B(t)\).

Related tags

Linear FunctionsPolynomialsLinear GrowthComparisonDifference EquationsLinear Growth And DecayIntroduction To PolynomialsMathematics

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