Answer: Eric practiced piano for 2 hours this week.
Step-by-step explanation: Given that Eric practiced piano and guitar for a total of 8 hours this week . He practiced the piano [tex]\dfrac{1}{4}[/tex] of that time.
We are to find the number of hours that Eric practiced the piano this week.
Let, 'h' represents the number of hours that Eric practiced piano this week.
Then, according to the given information, we have
[tex]h=\dfrac{1}{4}\times\textup{total number of hours Eric practiced piano and guitar}\\\\\\\Rightarrow h=\dfrac{1}{4}\times 8\\\\\\\Rightarrow h=2~\textup{hours}.[/tex]
Thus, Eric practiced piano for 2 hours this week.
