12. John borrowed $80 from his sister, Joan. He agreed to pay her back at a rate of $6 per week. Create a function, P, that gives

Question

12. John borrowed $80 from his sister, Joan. He agreed to pay her back at a rate of $6 per

week. Create a function, P, that gives the amount of money that john still owes Joan after

w weeks.

12 (b) John told Joan that he will have paid her back all of the money, after making

payments for 13 weeks.. Explain why John is incorrect?

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Eirian 4 years 2021-09-01T01:02:39+00:00 1 Answers 10 views 0

Answers ( )

  1. ngocdiep
    0
    2021-09-01T01:03:52+00:00
    Reply

    Answer:

    • P = 80 – 6w

    Step-by-step explanation:

    • Initial amount = $80
    • Payment each week = $6

    Required function:

    • P = 80 – 6w

    Time required to pay all money. At this time P = 0

    • 0 = 80 – 6w
    • 6w = 80
    • w = 80/6
    • w = 13.33

    Since w > 13, John needs 14 weeks

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