how do you solve this quadratic equation? tickets= -0.3x^2+12x+10

Question

Please show the work so I can understand.

Answer 1

What do you mean by solve?
If you know x, you can solve for "tickets"

Were you asked to find where tickets is zero?
or
0 = -.3 x^2 + 12 x + 10 ????
If that is the case, use the quadratic equation.

Answer 2

Here is a quadratic equation solver:
http://www.mathsisfun.com/quadratic-equation-solver.html