The expression 10/(3 + i) is equivalent to:
1) 3 - i
2) (15 + 5i)/4
3) 3 + i
4) 5/4

The answer is 2) (15 + 5i)/4

proof
10/(3 + i)=10 (3 - i)/(3 + i) (3 - i)= 5(3 - i) /4

Ithink you're supposed to multiply 12.50 which is how much he makes per hour and then multiply it by each number then add whats left togrther and there's your answer