Answer:
k = 5
Step-by-step explanation:
Subtract both sides by 1/2:
k/2 = 5/2
Multiply both sides by 2:
k = 5
Answer:
We can describe FOIL using the distributive property of multiplication. For real numbers x, y, and z the distributive property of multiplication states that

Now let
, where v and w are real numbers.
Then 
Here, we can again use the distributive property of multiplication to get

Hence, it follows that

This is the method of FOIL (first: xv, outside: xw, inside: yv, last: yw)
For example, 
The total amount repaid will be
.. monthly payment × number of months
.. = $2,160 × 360
.. = $777,600
Subtracting the amount of the principal that was repaid gives the interest.
.. $777,600 -360,000 = $417,600 . . . . total interest paid
40.000 in 7 year the company deposit money