Question

Troy puts $1300 in an account that does not earn any interest. Every month

he deposits the same amount of money. This sequence represents his
account balance for the first few months:
$1300, $1500, $1700, ...
What is the explicit formula for the amount of money in his account in month
n?
O A. a(n) = 1300 - 200(n-1)
O B. a(n) = 200 - 1300(n - 1)
O C. a(n) = 200 + (n − 1)1300
O D. a[n) = 1300 + (n − 1)200

Answer 1

Answer: Option D

Explanation:

You can clearly see that they said he added the same amount of money every day, so cross of Option A and B.

Now, you're left with C and D. And we know that N stands for negative, and on option c, it shows 200 before 1300, it's possible that you might have to change the addition sign to a subtraction sign, so cross of C. Now, you're left with D. D is the only answer that isn't crossed off, so D is the answer.

Hope I helped! <3