SOLUTION: -4\5x^2 + 7\2x - 1 If the above parabolic equation represents a profit function, what is the maximising profit?

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: -4\5x^2 + 7\2x - 1 If the above parabolic equation represents a profit function, what is the maximising profit?      Log On


   

Question 1080644: -4\5x^2 + 7\2x - 1
If the above parabolic equation represents a profit function, what is the maximising profit?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Completing the square and putting into vertex form,
p%28x%29=-%284%2F5%29%28x-35%2F16%29%5E2%2B%284%2F5%29%2835%2F16%29%5E2-1

Maximum profit would be %284%2F5%29%2835%2F16%29%5E2-1.
2.83