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A temperature model is (T(h)=38-2.5h). What will the temperature be at (h=8)?
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Answer and explanation
Correct answer: 18
Substitute h=8 in the model: \(T(8)=38-2.5\times 8=38-20=18\). Therefore, the temperature is 18. Option 20 may result from multiplying 2.5 incorrectly. Exam tip: In a linear model, perform multiplication before addition or subtraction.
Frequently asked questions
What is the correct answer to this question?
18
Why is this the correct answer?
Substitute h=8 in the model: \(T(8)=38-2.5\times 8=38-20=18\). Therefore, the temperature is 18. Option 20 may result from multiplying 2.5 incorrectly. Exam tip: In a linear model, perform multiplication before addition or 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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