If (X(t)=18+8t), what is the difference between (X(6)) and (X(0))?
Answer and explanation
Correct answer: 48
Here, \(X(6)=18+8\times6=66\) and \(X(0)=18\). Therefore, the difference is \(66-18=48\). Option 66 is the value of \(X(6)\), not the difference. Exam tip: when finding the difference between two values of a linear expression \(a+bt\), the constant term \(a\) cancels out.
Frequently asked questions
What is the correct answer to this question?
48
Why is this the correct answer?
Here, \(X(6)=18+8\times6=66\) and \(X(0)=18\). Therefore, the difference is \(66-18=48\). Option 66 is the value of \(X(6)\), not the difference. Exam tip: when finding the difference between two values of a linear expression \(a+bt\), the constant term \(a\) cancels out.
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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