What's the solution to rachel bought one double pack of cd's for $20.this is $4 less than 3/4 the cost of a triple pack of cd's. what is the price of a triple pack of cd's?

Heather is writing a quadratic function that represents a parabola that touches but does not cross the x-axis at x = -6. which function could heather be writing? fx) = x2 + 36x + 12 = x2 - 36x - 12 f(x) = -x + 12x + 36 f(x) = -x? - 12x - 36