If (R(h)=84-6h), what is the value of (R(h)) at (h=7)?
Answer and explanation
Correct answer: 42
Given \(R(h)=84-6h\). Substituting \(h=7\), we get \(R(7)=84-6\times7=84-42=42\). Therefore, 42 is correct. The value 48 would result from an incorrect calculation instead of applying the multiplication and subtraction properly. Exam tip: substitute the given value first, then follow the order of operations.
Frequently asked questions
What is the correct answer to this question?
42
Why is this the correct answer?
Given \(R(h)=84-6h\). Substituting \(h=7\), we get \(R(7)=84-6\times7=84-42=42\). Therefore, 42 is correct. The value 48 would result from an incorrect calculation instead of applying the multiplication and subtraction properly. Exam tip: substitute the given value first, 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.
Student feedback
Was this question useful?
👍 0 Helpful 👎 0 Not helpful
Yes 0% No 0%
0 responsesStudent Reviews
No published reviews yet.
