Answer:
I am sorry but if this is wrong but i think it is either 21,because it is divisible by 3 and 12 / 3 = 4 which is a denominator
Step-by-step explanation:
21 because it is divisible by 3 and 12 / 3 = 4 which is a denominator.
It gives 3 choices of toppings, and asks for the number of ways to arrange two toppings. Using the formula they give, n = 3 and k =2. So:

Thus, the answer is 3.
Well you can find the solution using the calculator
The answers:
27
33.9
18.97
34.85
60
The lines are parallel. Therefore the angle is the same.
Something is already circled.