Final answer:
Dan spent $10+xy/100 dollars
Step-by-step explanation:
Dan started with $10. He bought x magazines for y cents each. To find the total amount spent, we need to multiply the number of magazines (x) by the cost per magazine (y) in cents. This gives us xy cents.
To convert this to dollars, we need to divide xy cents by 100 to get the dollar amount. So the correct answer is Option D) 10+xy/100 dollars.