If (p(x)=4x+7), what is the value of (p(3))?
Answer and explanation
Correct answer: 19
Given \(p(x)=4x+7\). To find \(p(3)\), substitute 3 for \(x\): \(p(3)=4\times3+7=12+7=19\). Hence, the correct answer is 19. The value 21 would result from an incorrect calculation instead of adding 7 to 12. Exam tip: when evaluating a polynomial, carefully replace every \(x\) with the given number.
Frequently asked questions
What is the correct answer to this question?
19
Why is this the correct answer?
Given \(p(x)=4x+7\). To find \(p(3)\), substitute 3 for \(x\): \(p(3)=4\times3+7=12+7=19\). Hence, the correct answer is 19. The value 21 would result from an incorrect calculation instead of adding 7 to 12. Exam tip: when evaluating a polynomial, carefully replace every \(x\) with the given number.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Introduction to Polynomials. Topic: Linear polynomials.
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