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If (y=7+1.5x), what is (y) at (x=10)?

Answer and explanation

Correct answer: 22

Substituting x=10 gives y=7+1.5(10)=7+15=22. Therefore, the correct answer is 22. The value 18 may result from incorrectly adding or multiplying 7 and 1.5; here, 1.5 must first be multiplied by 10. Exam tip: after substitution, perform multiplication before addition or subtraction.

Related tags

Linear EquationsSubstitutionDecimal CoefficientsAlgebraic EvaluationPolynomialsLinear Growth And DecayIntroduction To PolynomialsMathematics

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