First find the amount of each payment:

The total cost will be 40 payments plus service charges.

The percentage is the service charge divided by total cost:
Answer:
I believe your answer is correct.
Step-by-step explanation:
Answer:
15 + -4j = 43
Solving
15 + -4j = 43
Solving for variable 'j'.
Move all terms containing j to the left, all other terms to the right.
Add '-15' to each side of the equation.
15 + -15 + -4j = 43 + -15
Combine like terms: 15 + -15 = 0
0 + -4j = 43 + -15
-4j = 43 + -15
Combine like terms: 43 + -15 = 28
-4j = 28
Divide each side by '-4'.
j = -7
Simplifying
j = -7
Step-by-step explanation: