Answer: The correct option is
(A)

Step-by-step explanation: Given that Juan can download new songs for $1.29 each.
We are to write an equation to show how many songs he can download for $10.00.
Let x represents the number of songs that Juan can download for $10.00.
Then, according to the given information, the equation can be written as follows :

Thus, the required equation is

Option (A) is CORRECT.