A student's marks increase as (N(w)=30+5w). What will the marks be at (w=3)?
Advertisement
Answer and explanation
Correct answer: 45
Substitute \(w=3\) in the given expression: \(N(3)=30+5(3)=30+15=45\). Therefore, the correct answer is 45. The value 40 would be obtained for \(w=2\), so it is a close but incorrect option. Exam tip: To evaluate an expression, substitute the given value of the variable carefully.
Frequently asked questions
What is the correct answer to this question?
45
Why is this the correct answer?
Substitute \(w=3\) in the given expression: \(N(3)=30+5(3)=30+15=45\). Therefore, the correct answer is 45. The value 40 would be obtained for \(w=2\), so it is a close but incorrect option. Exam tip: To evaluate an expression, substitute the given value of the variable carefully.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Introduction to Polynomials. Topic: Linear growth and decay.
Advertisement