Step-by-step explanation:
Total numbers of pizza toppings = 12
Number of three topping pizzas can be ordered are:

where = n = number of elements
k = number of elements choosen
n= 12 , k = 3

We calculated the number of permutations. We made this choice because in permutation order of element matters but in combination its not.
Answer:
3
Step-by-step explanation:
Those are factors of 9 not multiples
The answer is c. Because there are 3 times more blank marbles than white marbles.
Answer:
18.0 km
Step-by-step explanation: