ANSWER:
6
STEP-BY-STEP EXPLANATION:
We have two toppings, the first is the ice cream container where there are two options and the second is the ice cream flavor where there are a total of three options.
Therefore, the number of possible ways to order ice cream would be:

There are a total of 6 ways to order an ice cream
The traveling time would be 470,588.235294km/hr
Probability of getting a red marble: 3/10
probability of getting a blue marble (after removing a red marble): 2/9
multiply the two fractions together:
6/90
simplify (divide by 6): 1/15 or .06666 repeating
6n + 15 = -42. If you wish to go further and find n, then subtract 15 from both sides, obtaining 6n = -57, so that n = -57/6.