The intersecting chords theorem states that whenever two chords intersect, the product of their pieces is constant.
So, in this case, we have

Plugging your values, we have

This equation has solutions
, but we can't choose
, because it would lead to

So, the only feasible solutions is 
Answer:
b
Step-by-step explanation:
9(y+6)+2y(y+3)/((y+3)(y+6))= optin b
C = 2 because 2 times 2 is 4 and 4+2 = 6
A quadratic function models the profit of the company and the maximum/minimum value of the quadratic function occurs on its vertex.
The given function is:

The equation is already in standard form, the vertex of the parabola as seen from the equation is (5,12)
This mean if the company sets the price of socks to $5 they will earn a maximum profit which is $ 12 million