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If (g(x)=75-5x), what is the value of (g(4)+g(9))?
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Answer and explanation
Correct answer: 85
Given \(g(x)=75-5x\), \(g(4)=75-5(4)=55\) and \(g(9)=75-5(9)=30\). Therefore, \(g(4)+g(9)=55+30=85\). Getting 95 would result from an error in substitution or arithmetic. Exam tip: evaluate the function separately at each input before adding the results.
Frequently asked questions
What is the correct answer to this question?
85
Why is this the correct answer?
Given \(g(x)=75-5x\), \(g(4)=75-5(4)=55\) and \(g(9)=75-5(9)=30\). Therefore, \(g(4)+g(9)=55+30=85\). Getting 95 would result from an error in substitution or arithmetic. Exam tip: evaluate the function separately at each input before adding the results.
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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