SOLUTION: How many tractors need to be sold for a profit of $20,000 n = number of tractors P(n)=2.7(n)+9(n)-3 I tried to use the quadratic formula but I can't figure it out. I know

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: How many tractors need to be sold for a profit of $20,000 n = number of tractors P(n)=2.7(n)+9(n)-3 I tried to use the quadratic formula but I can't figure it out. I know       Log On


   

Question 134440: How many tractors need to be sold for a profit of $20,000
n = number of tractors
P(n)=2.7(n)+9(n)-3
I tried to use the quadratic formula but I can't figure it out. I know that the answer is supposed to be 7.
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
You don't have a quadratic equation posted.
Cheers,
Stan H.