Mathematics
Grade10
Easy

Question

Reagan has $ 122 in his savings account. He deposited $ 70 each week from his job for the first five weeks of summer. In the sixth week, Reagan got a raise and increased his weekly deposits by $ 12. Write a piecewise-defined function to represent his bank balance. find f(8).

  1. 694
  2. 778
  3. 718
  4. 682

Hint:

finding a piecewise-defined function to represent his bank balance

The correct answer is: 718


    Given that;
    Reagan has $ 122 in his savings account
    Reagan deposited $ 70 each week from his job for the first five weeks of summer.
    In the sixth week, Reagan got a raise and increased his weekly deposits by $ 12
    to represent his bank balance
    x = 8,
    f(x) = 62 + 82x
    = 62 + 82×8 = 718

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