Answer:

Step-by-step explanation:
A quadratic equation is a equation that takes the form: 
Ex. Using our definition of quadratic equations,
,
We can set a = 2, b = 1, c = 6:


Which can then be solved (if you are trying to solve it) as:


Answer: The cost per donut is 0.45
Step-by-step explanation: A dozen donuts is 12 donuts. $5.40 dollars divided by 12 is 0.45.