Answer:
1, 2.2, 5.5, 10.2.
Step-by-step explanation: these are simplified to the nearest tenth
-12 + 3x + 2 = 5x - 10 - 8x
-10 + 3x = -3x -10
-10 + 6x = -10
6x = 0
x = 0
I understand that it means that out of every 10 hours, a cat spends 7 sleeping (not 7 hours in a day).
this means that a cat is sleeping
![\frac{7}{10}*100%=70%](https://tex.z-dn.net/?f=%20%5Cfrac%7B7%7D%7B10%7D%2A100%25%3D70%25%20)
a percentage stays constant, this means that a cat sleeps 70 % of each 10 hours, but also 70% of the day.
This is an example of the commutative property of multiplication.
That property states:
![(a \times b) \times c = a \times (b \times c)](https://tex.z-dn.net/?f=%28a%20%5Ctimes%20b%29%20%5Ctimes%20c%20%3D%20a%20%5Ctimes%20%28b%20%5Ctimes%20c%29)
So using that property, we can figure out that
3 should be in the blank.