If (K(t)=144-12t), what is (K(8))?
Answer and explanation
Correct answer: 48
Substitute 8 for t: \(K(8)=144-12\times 8=144-96=48\). Therefore, the correct answer is 48. The value 96 is only \(12\times 8\); it must still be subtracted from 144. Exam tip: To evaluate a function, substitute the given value for the variable and follow the order of operations.
Frequently asked questions
What is the correct answer to this question?
48
Why is this the correct answer?
Substitute 8 for t: \(K(8)=144-12\times 8=144-96=48\). Therefore, the correct answer is 48. The value 96 is only \(12\times 8\); it must still be subtracted from 144. Exam tip: To evaluate a function, substitute the given value for the variable and 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.
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