Homework Help: math word fu

Posted by Jackie chan on Monday, October 22, 2012 at 11:08pm.

A new car worth 45K is depreciating in value by 5K per year. How can I write a formula that models the cars' value,y, in dollars, after x years?Then using the formula determine after how many years the cars' value will be 9K.

math word fu - Steve, Tuesday, October 23, 2012 at 5:00am
y = 45000 - 5000x

set y=9000 and solve for x

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