Answer:

Step-by-step explanation:
The sum you are trying to understand is this.

Remember that in general when you have a geometric series
you have that
and that equality is true as long as
.
Therefore here we have
and 
Therefore we can use the formula and

The sum of -5a and 3 is greater than 1
9 is 12% of 75 check it 9* 100 = 900 / 75 = 12
The answer would be, it was reduced by 35%
Answer:
D
Step-by-step explanation:
If its right let me know I think this is right