For this case we have the following equation:

Let 
We have:

By definition, given an equation of the form 
The quadratic formula, to find the solution can be written as:

In this case we have:

Substituting in the quadratic formula we have:
See attached image
Answer:
Option B
As there are 10 doughnuts in each cartoon and 4 in each bag, the formula would be:
t=10c+4b
9c + 5ab/ 11c is the simplified answer
Answer:
The answer is c i believe
Step-by-step explanation: