9 A container had a mass of 1.26 kg when it was completely filled with sand. It had a mass of 1.05 kg when it was filled with sand. Find the mass of the container.​

0.7 kg

Step-by-step explanation:

x = mass of the empty container (just the container alone)

y = mass of the sand in the full container.

x + y = 1.26 kg

x + 5/8 × y = 1.05 kg

=>

x = 1.26 - y

(1.26 - y) + 5y/8 = 1.05

8×(1.26 -y) + 5y = 8×1.05

8×1.26 - 8y + 5y = 8×1.05

10.08 - 3y = 8.4

3y = 1.68

y = 0.56 kg

x = 1.26 - 0.56 = 0.7 kg

step-by-step explanation:

what grade level is this? need to know so i can look in my old textbooks!

step-by-step explanation: the answer is 27. first multiply .32 by 25 which equals 8. then add 8 to 25 which gives you 33. then you subtract that from 6 since she gave 6 to her brother.

,, add !