Answer: The correct option is
(A)
![1.29x=10.](https://img.qammunity.org/2020/formulas/mathematics/middle-school/yrgwmg7k2tv41fjkieygbgzu1ndwg61btm.png)
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 :
![1.29* x=10\\\\\Rightarrow 1.29x=10.](https://img.qammunity.org/2020/formulas/mathematics/middle-school/qiczjwsicc3tu0fzfrerng7z2u9c8egyib.png)
Thus, the required equation is
![1.29x=10.](https://img.qammunity.org/2020/formulas/mathematics/middle-school/yrgwmg7k2tv41fjkieygbgzu1ndwg61btm.png)
Option (A) is CORRECT.