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If (R(t)=b-11t) and (R(4)=76), what is (b)?

Answer and explanation

Correct answer: 120

Given R(t)=b-11t and R(4)=76. Substituting t=4 gives b-11(4)=76, so b-44=76. Adding 44 to both sides gives b=120. Hence, 120 is the correct option. If b were 110, then R(4)=110-44=66, not 76. Exam tip: In a linear expression, first substitute the given value of the variable and then isolate the unknown term.

Related tags

Linear EquationsPolynomialsSubstitutionInitial ValueLinear DecayLinear Growth And DecayIntroduction To PolynomialsMathematics

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