Use the following abbreviations:
y = year,
d = day,
h = hour,
min = minute,
s = second,
ms = millisecond.
Then

Therefore, the correct calculation is
1000 * 60 * 60 * 24 * 365
Answer: 1000 * 60 * 60 * 24 * 365
Answer : 23
-5 * -4 = 20 ( when you multiply 2 negatives the answer is always positive )
20 + 3 = 23
Answer: 86
Step-by-step explanation: You would add up all the numbers, then divide by the amount of numbers there are.
For example
79+89+90=258
Since there are three numbers(79,89,90) you would divide 258 by 3 and would get 86.
Hopes this helps

an is the 'nth' term
a1 is first term
d=common difference (found by doing

)
n=numerical representation of which term