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Subjects
Class 9MathematicsIntroduction to PolynomialsLinear growth and decayEasyLevel 39
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If (M(x)=18+2x), what is (M(6))?

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Answer and explanation

Correct answer: 30

Substitute 6 for x: M(6)=18+2(6)=18+12=30. Therefore, option B is correct. Getting 36 would require incorrectly multiplying 18 and 12. Exam tip: When evaluating a function, substitute the given value for the variable first and then follow the order of operations.

Related tags

PolynomialsLinear ExpressionFunction EvaluationSubstitutionLinear Growth

Frequently asked questions

What is the correct answer to this question?

30

Why is this the correct answer?

Substitute 6 for x: M(6)=18+2(6)=18+12=30. Therefore, option B is correct. Getting 36 would require incorrectly multiplying 18 and 12. Exam tip: When evaluating a function, substitute the given value for the variable first and then follow the order of operations.

Which subject and chapter does this question cover?

This is a Class 9 Mathematics question. Chapter: Introduction to Polynomials. Topic: Linear growth and decay.

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  3. 3In the linear rule (C(d)=15+2d), what is the initial value?
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  5. 5If (S(t)=10+6t), what will be the value of (S(t)) at (t=4)?
  6. 6If (M(t)=90-7t), what is the value of (M(t)) at (t=5)?
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  10. 10Which rule represents linear decay?
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