Question 1 – Think & Reflect (Page 23) - Exploring Linear Patterns - Chapter 2 Class 9 - Introduction to Linear Polynomials (Ganita Manjari

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Question 1 – Think & Reflect (Page 23) What amount will be left on the 15th day? How many days will it take for the entire amount to be spent? Day Number 0 1 2 3 4 Amount left (₹) 100 We found that Amount left = 100 – 5n We have to find amount left after 15th day Amount left after 15th day Putting n = 15 in our formula Now, Amount left = 100 – 5n = 100 – 5 × 15 = 100 – 75 = 25 Thus, after 15th day, ₹ 25 is left Also, we have to find How many days will it take for the entire amount to be spent Days taken for entire amount to be spent Putting Amount left = - in our equation and finding n We have Amount left = 100 – 5n 0 = 100 – 5n 5n = 100 n = 100/5 n = 20 Thus, after 20 days, her full amount will be spent