Members in a class are (M(w)=32+2w). After how many weeks will the members be (50)?
Answer and explanation
Correct answer: 9
For 50 members, form the equation 32+2w=50. Thus, 2w=18 and w=9. Therefore, the number of members will be 50 after 9 weeks. At 8 weeks, the number is 32+2(8)=48, so it is not correct. Exam tip: Equate the given expression to the target value before solving for the variable.
Frequently asked questions
What is the correct answer to this question?
9
Why is this the correct answer?
For 50 members, form the equation 32+2w=50. Thus, 2w=18 and w=9. Therefore, the number of members will be 50 after 9 weeks. At 8 weeks, the number is 32+2(8)=48, so it is not correct. Exam tip: Equate the given expression to the target value before solving for the variable.
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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