9 divided by 72 = 0.125 0.125 is the weight of one book 0.125 times 80 = 10kg. So 80 books weight 10kg. 72 divided by 9 = 8 books make up 1 kg. 8 times 6 =48
Do 1/2 x 1/10 which equals 10/2. 10/2 is 5 gallons if u divide 10 divided by 2. So the unit rate is 5 gallons per minute. Also can u mark me as brainlist
