Answer:
Step-by-step explanation:
Answer:
1.14
Step-by-step explanation:
0.8+0.34
Answer:
6 quarters, 4 dimes, and 2 nickels
Answer:
He will earn $6 in interest in 9 months.
Step-by-step explanation:
This is a simple interest problem.
The simple interest formula is given by:

In which E is the amount of interest earned, P is the principal(the initial amount of money), I is the interest rate(yearly, as a decimal) and t is the time.
After t years, the total amount of money is:

Initial deposit of $400.
This means that 
2% annual interest
This means that 
How much interest will he earn in 9 months?
An year has 12 months, this means that 
This is E. So

He will earn $6 in interest in 9 months.
You need to group the like terms (the terms with the same or no variable) together so it is:
5y-6y-y +6
Then you combine the like term and it becomes
5y-7y +6
-2y+6
which can also be written as 6-2y
Hope this helps :)