If (O(t)=64-6t), what is (O(t)) at (t=7)?
Answer and explanation
Correct answer: 22
Substitute \(t=7\) in the given expression: \(O(7)=64-6\times 7=64-42=22\). Therefore, 22 is correct. The value 28 would result from using \(6\times 6\), which does not match the given value \(t=7\). Exam tip: Substitute the variable value first, then follow the correct order of multiplication and subtraction.
Frequently asked questions
What is the correct answer to this question?
22
Why is this the correct answer?
Substitute \(t=7\) in the given expression: \(O(7)=64-6\times 7=64-42=22\). Therefore, 22 is correct. The value 28 would result from using \(6\times 6\), which does not match the given value \(t=7\). Exam tip: Substitute the variable value first, then follow the correct order of multiplication and subtraction.
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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