The quadratic formula is
.
From the problem, a is 1, b is -1, and c is 12. Plugging in these values gives:

Because there is a square root of a negative number, there is no solution.
Answer:
1/8
Step-by-step explanation:
1/2 of 1/4 is 1/8
You have to take the amount of money payed, which in this case is 45.50, and divide it with 7.