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Rice left in a bag is (R(d)=55-3d) kg. How much rice will remain at (d=5)?

Answer and explanation

Correct answer: 40 kg

Given \(R(d)=55-3d\). Substituting \(d=5\), \(R(5)=55-3(5)=55-15=40\) kg. Therefore, 40 kg of rice remains. The value 15 kg is only the amount decreased in 5 days, not the amount left. Exam tip: To find a function value, substitute the given number for the variable, multiply first, and then add or subtract.

Related tags

PolynomialsLinear ExpressionSubstitutionLinear DecayWord ProblemLinear Growth And DecayIntroduction To PolynomialsMathematics

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