MATH 1113 Lecture Notes - Lecture 7: Interest, Japanese Language

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Math 1113 lecture 7 1. 5 linear equations, functions, zeros, & applications. I=prt: p principal investment/borrowed amount r interest rate (% per year) or written as decimal t time (in years) Two loans that total ,000 are borrowed and accumulates interest over one year. One loan is borrowed at 5%, and the other is borrowed at a rate of 8%. Let loan at 5% = x and loan at 8% = y x + y = 12000 y = 12000 x. I = (loan at 5%) * rate * time + (loan at 8%) * rate * time. 750 = (x * 0. 05 * 1) + (12000 x) * 0. 08 * 1. 12000 7000 = 5000 = loan @ 8% Finding zeros of linear expressions: ex. f(x) = 5x + 9 f(x) = 0 = 5x + 9. 1 there are 232,000 words in the japanese language, which is 19% more than the number of words in the russian language.

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