Answer:
Amina practices the piano for 54 minutes each week.
Step-by-step explanation:
45% * 120min = 0.45 * 120min = 9/20 * 120min = 9 * 6min = 54min
this is prime
the answer for -k/3=9 is K= -27
hope this helps. if you want the steps let me and i will put it their