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In a data plan, data is (D(d)=4+1.5d) GB. What will be the total data at (d=8)?

Answer and explanation

Correct answer: 16

Given \(D(d)=4+1.5d\). Substituting \(d=8\), we get \(D(8)=4+1.5\times8=4+12=16\) GB. Therefore, 16 is correct. The value 14 does not include the fixed initial 4 GB and is not the total. Exam tip: Substitute the given value in every term of a linear expression, then multiply before adding.

Related tags

Linear GrowthPolynomialsSubstitutionLinear ExpressionDecimal MultiplicationLinear Growth And DecayIntroduction To PolynomialsMathematics

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