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If (P(t)=52+4t) and (Q(t)=148-8t), at which (t) will (P(t)=Q(t))?

Answer and explanation

Correct answer: \(t=8\)

For equality, set \(52+4t=148-8t\). Moving \(8t\) to the left gives \(12t=96\), so \(t=8\). On checking, \(P(8)=52+32=84\) and \(Q(8)=148-64=84\). At \(t=10\), the two values are not equal. Exam tip: while equating linear expressions, collect all terms containing \(t\) on one side and constants on the other.

Related tags

Linear EquationsPolynomialsLinear GrowthLinear DecayEqualityAlgebraic ExpressionsLinear Growth And DecayIntroduction To Polynomials

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