You have 3 online accounts in three different banks valued at: bank "A" = $250.67, 12% interest, bank "B" $765.13, 7% interest, and bank "C" $28,500.36, 9% interest. What is the average interest gained from the three accounts in one year?

Step-by-step explanation:

we know that

The simple interest formula is equal to

where

I is the Final Interest Value

P is the Principal amount of money to be invested

r is the rate of interest  

t is Number of Time Periods

in this problem we have

Bank A

substitute in the formula above

Bank B

substitute in the formula above

Bank C

substitute in the formula above

Find the average interest gained from the three accounts in one year

x=2 & x=1

step-by-step explanation:

7*1=7

7*2=14

7 is less than 21

14 is less than 21