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If (y=9+3.5x), what is (y) at (x=6)?

Answer and explanation

Correct answer: 30

Substitute x=6 in the given equation: y=9+3.5(6)=9+21=30. Therefore, the correct answer is 30. Option 27 would result from using 9+3.5×5, so it is not correct for x=6. Exam tip: After substitution, perform multiplication before addition or subtraction.

Related tags

PolynomialsLinear ExpressionSubstitutionDecimal CoefficientLinear GrowthLinear Growth And DecayIntroduction To PolynomialsMathematics

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