The answer is A. It has side lengths of 3.
The solution to this question is 39
Add 12 to both sides. leaving you with
3x=21
then divide 3 on both sides. leaving you with
x=7
hopefully that’s right!!!
800$ because yearly he would deposit 8000$ and 10% of that would be 800$ :)
The answer is 15 or 1/4
I hope this helps you