The formula to find a certain number in an arithmetic sequence is an=a1+d(n−1)an=a1+d(n−1) . solve for n

Step-by-step explanation:

Given : The formula to find a certain number in an arithmetic sequence is

, where is the nth term , is the first term and d is the common difference.

To solve the formula for n , first subtract from both sides , we get

Now, divide d on both sides , we get

Now, add 1 to the both sides , we get

Or

10/60

step-by-step explanation:

if you divide 10 by 60 the answer is 0.166666 while if you divide or solve the other problems it equals 0.6