Answer:
5 / 5 equals ONE
So basically, isn't the answer simply 5/9?
Step-by-step explanation:
Answer 420.
a, is the first term. d is difference.
Since this is an arithmetic progression, I use this formula.
Un = nth term
Sn = sum of terms.
First find the number of terms, which is 20.
Then use the second formula to find the sum.
Answer: 13km
Step-by-step explanation: