bearing in mind that an explicit form is simply the sequence written as a function of some variables, so we simply simplify and add like-terms.

I believe the answer is a
It's called perfect cubes
Answer:
-21
Step-by-step explanation:
-3 * 7
Answer:it would take the plane 40 seconds
Step-by-step explanation:
if you multiply by two then you would be able to get 30
like 15 times 2 and since it’s 15 miles to 20 seconds or 15:20 you would have to multiply by the same number.