Answer:

Explanation:
Given:
Sandy was told to practice playing flute for =
hours per day
Sandy has already played =
hours today
To find:
how many hours does sandy still need to practice today?
Solution:
we can find simply by subtracting,
Sandy was told to practice playing flute for =
hours per day
=
=

Sandy has already played today =
hours today
=

Sandy still need to practice today =

Taking LCM of 12 and 9 = 36
=

=

=
=

Therefore,
hours still need to practice today.