Answer:
[tex]\frac{1}{2}[/tex](d)
Step-by-step explanation:
Brianna practices the piano 30 minutes each day.
Let she practices in d days.
30 minutes = 1/2 hour
The total number of hours she practice = (d × 1/2) hours
The expression will be
[tex]\frac{1}{2}[/tex](d)
