Answer: 
Step-by-step explanation:
For this exercise it is necessary to remember the following:
1) The Distributive Property states the following:

2) The multiplication of signs:

Knowing this, and having the following expression given in the exercise:

You can apply the Distributive property multiplying
and
, which are inside the parentheses, by
.
So, you get the following result:

5/6 = 11/6 8/10 x 6/11 48/110 = 24/55 is the answer you can flip the 2nd rational and the sign can be changed to multiplication.
Answer:
The 12th day.
Step-by-step explanation:
Every four days: 4th, 8th, 12th.
Every three days: 3rd, 6th, 9th, 12th.
You just find lowest common multiple of four and three. Which just means the first multiple they share.
Hopes this makes sense!