Answer:
y = <u>1</u><u> </u>x - <u>9</u><u> </u><u> </u><u>(</u><u> </u><u>L</u><u>.</u><u>C</u><u>.</u><u>M</u><u> </u>= 2 )
2 2
<u>1</u><u>(</u><u>1</u><u>x</u><u>)</u><u>-</u><u>1</u><u>(</u><u>9</u><u>)</u>
2
<u>x-9</u>
2
<u> </u><u> </u><u> </u><u> </u><u> </u><u> </u><u> </u>
Given that <span>Martin's unpaid credit card balance was $1539.39 and his APR is 13.2%.
APR is the annual interest rate, to get the monthly interest rate, we divide the APR by 12.
Thus, monthly interest rate is </span>

The interest charge for the month is given by

, where P is the previous balance, i is the monthly interest rate.
Thus, interest charge is

The balance after the monthly interest charge = $1,539.39 + $16.93 = $1,556.32
Therefore, the balance after the new transaction is given by $1,556.32 + $178 = $1734.32
The answer is 42 because you times 14 by 3