Answer:
28%
Step-by-step explanation:
-The price after the coupon discount is calculated as;

We reduce the discounted price by the service fee to determine the effective purchase price:

#Compare this final price to the original price:

Hence, the final price was 28% less than the original price.
Your multiplying 2 on the 4,8,16,32 one then adding 1 on the 1,2,3 one which could determine the rate of change
Answer:
In December, Zalma will have $480.
Step-by-step explanation:
The time from March to October is 7 months. In those 7 months, she gains $280. So every month, her investment gains $40.
The time from March to December is 9 months. She will gain $360 during that time. We add her initial $120 with the $360, and Zalma will have $480.
It's not confirmed, but it's what I got. :D
2(10-3) distribute = 2*10 is 20 and 2*3 is 6
20-6+(5-14/2)
now 20-6 is 14
14+(5-14/2)
now 14/2 is 7
14+(5-7)
now 5-7 is -2
14+-2
is 12
the answer is 12
but if you want to you can do 12/3 to get the greatest common factor
which is 4
hope i help you :P