Definition: a fraction a/b is reduced if a and b are relatively prime.
prove: every rational number is represented by one and only one reduced fraction with a positive denominator.

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How can writing phrases as algebraic expressions you solve problems?

You just purchased two coins at a price of $670 each. because one of the coins is more collectible, you believe that its value will increase at a rate of 7.1 percent per year, while you believe the second coin will only increase at 6.5 percent per year. if you are correct, how much more will the first coin be worth in 15 years?