Answer:
9
Step-by-step explanation:
16.25-5=11.25
11.25/9=1.25
6 and 2/5 times 4 and 1/2 = 28.8 or 28 and 4/5 minutes
X-42.7
Y-5.34
should be 3^X = 7 and X = log7/log3