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If (y=28+5x), what is the value of (y) at (x=4)?

Answer and explanation

Correct answer: 48

Given y=28+5x, substitute x=4: y=28+5(4)=28+20=48. Therefore, 48 is correct. Option 52 would result from incorrectly treating 5×4 as 24, whereas it equals 20. Exam tip: Substitute the given value for the variable and perform multiplication before addition.

Related tags

Linear EquationsSubstitutionAlgebraic ExpressionsPolynomialsLinear GrowthLinear Growth And DecayIntroduction To PolynomialsMathematics

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