SOLUTION: The equation V=-2000t+20,000 describes the value in dollars of a certain model of car after it is T years old. If a car is worth $12,000 into the equation to find the age of the c

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons -> SOLUTION: The equation V=-2000t+20,000 describes the value in dollars of a certain model of car after it is T years old. If a car is worth $12,000 into the equation to find the age of the c      Log On


   

Question 151645: The equation V=-2000t+20,000 describes the value in dollars of a certain model of car after it is T years old. If a car is worth $12,000 into the equation to find the age of the car.
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
V=-2000t%2B20000 Start with the given equation.


12000=-2000t%2B20000 Plug in V=12000.


12000-20000=-2000t%2Bcross%2820000-20000%29 Subtract 20,000 from both sides.


-8000=-2000t Subtract


%28-8000%29%2F%28-2000%29=cross%28%28-2000%29%2F%28-2000%29%29t Divide both sides by -2,000.


4=t Divide


So the answer is t=4 which means that car is 4 years old.