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If (P(t)=75+8t) and (Q(t)=219-10t), at which (t) will (P(t)=Q(t))?

Answer and explanation

Correct answer: \(t=8\)

For equality, set \(75+8t=219-10t\). Moving \(10t\) to the left gives \(18t=144\), so \(t=8\). Substituting \(t=6\) does not give equal values, so it is incorrect despite being a close distractor. Exam tip: When equating linear expressions, collect all terms containing \(t\) on one side first.

Related tags

Linear EquationsPolynomialsEquality Of ExpressionsGrowth And DecayAlgebraic SubstitutionLinear Growth And DecayIntroduction To PolynomialsMathematics

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