0 reads0 ratings0 helpful
If (P(t)=a+7t) and (P(0)=31), what is (a)?
Advertisement
Answer and explanation
Correct answer: 31
Substitute t=0: P(0)=a+7(0)=a. Since P(0)=31, a=31. The number 7 is the rate of increase, not the initial value. Exam tip: in a linear expression a+bt, the value at t=0 is always a.
Frequently asked questions
What is the correct answer to this question?
31
Why is this the correct answer?
Substitute t=0: P(0)=a+7(0)=a. Since P(0)=31, a=31. The number 7 is the rate of increase, not the initial value. Exam tip: in a linear expression a+bt, the value at t=0 is always a.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Introduction to Polynomials. Topic: Linear growth and decay.
Student feedback
Was this question useful?
Was this question useful?
👍 0 Helpful 👎 0 Not helpful
Difficulty
Easy0%
Medium0%
Hard0%
Was the explanation clear?
Yes 0% No 0%
0 responsesStudent Reviews
No published reviews yet.
Advertisement