
Kenneth S. answered 06/20/18
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Expert Help in Algebra/Trig/(Pre)calculus to Guarantee Success in 2018
reduction of a price by 0.5 for every year would be simply subtraction of fifty cents per year (age) of truck. Not believable.
Possibly you meant that the price should be HALVED for each year.
Similarly, the 0.2 amount should be expressed more correctly, I believe--namely multiply by 0.8t for t thousands of miles on the odometer.
Please re-think the question and make appropriate revision(s).