This question is a little ambiguously worded, however I assume the answer would simply be:
$500 - $112 - $28 = the amount he has left.
Hope this helped :))
Answer: 
<u>Multiply</u>

<u>Multiply</u>

<u>Note</u>
Multiplying/Dividing a negative to a positive will equal a negative. (N×P=N)
Multiplying/Dividing a negative to a negative will equal a positive. (N×N=P)
Multiplying/Dividing a positive to a positive will equal a positive. (P×P=P)
Answer:
x+14y
Step-by-step explanation:
9x+2y-8x+12y
x+14y