The property is inverse operation because he add 8 to both side.
I think this is right. The answer is 12.
24 times 9 equals 216, which is the area of the room floor.
Then I did 6 times 3 equals 18.
Then I divided 216 by 18 to get 12.
Answer:

Step-by-step explanation:
<u>Given:</u>
Speed = v = 54 km/h
Time = 1 hour 20 min = 1 hour (20/60) hour = 1.33 hrs
<u>Required:</u>
Distance = S = ?
<u>Formula:</u>
S = vt
<u>Solution:</u>
S = (54)(1.33)
S = 71.82 km
![\rule[225]{225}{2}](https://tex.z-dn.net/?f=%5Crule%5B225%5D%7B225%7D%7B2%7D)
Hope this helped!
<h3>~AH1807</h3>
Answer:A
Step-by-step explanation: The formula for finding volume is LxWxH. 21x 11 is 231, and since one side is 11 so will the other side be, and then you get 2,541 m cubed.