Answer:
63 interest per year
Step-by-step explanation:
If one year is 7% then you want to do
7x9
7x9=63 interest per year
Step-by-step explanation:





x = 3 or x = -2 we dont use the (-2) because we have a sqrt
So x =3
-12+-12=-24
-6+-6=-12
-11+-11=-22
-10+-10=-20
-9+-9=-18
-8+-8=-16
-7+-7=-14
-5+-5=-10
-4+-4=-8
-3+-3=-6
-1+-1=-2
1+1=2
2+2=4
3+3=6
4+4=8
5+5=10
6+6=12