Algebra: is this right?

the amount of money remaining to be paid on a loan, y, is a function of the number of months, x. Suppose that
monthly payments of $225 are to be made on an original loan
amount of $3,000.
Write an expression in terms of x that gives the amount of money remaining to be paid.

$3,000 - $225x

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asked by bart
  1. The expression is correct.

    The complete mathematical relationship including the function y(x) is:

    y(x) = 3000 - 225x

    State that the unit of y(x) is in dollars, and x represents the number of monthly payments made.

    Note: the above assumes zero interest rate.

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    posted by MathMate

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