No.
If a rational number can be an integer, x and y could be 5.5 and .5, or something that adds up to (number).0. This means, if the two non-rational numbers add up, they could be irrational, but the result isn't.
Answer:
Option B
Step-by-step explanation:
For all the answers for a multiple choice test don't require to be arranged in an order.
Therefore, By the definition of combination, it's an example of combination where order doesn't matters.
Option B is the answer.
The answer is 25. To check 10/.4 is 25 and 0.4 equals to 2/5
I’ll solve number 3.
You need to group the like terms. For example, -4n + 6n = 2n
8=2n
Now, we need to keep n by itself.
2n/2 = n
Whatever you do to one side, you need to do to the other.
8/2 = 4
So, in conclusion, n = 4.
I hope this helps for you to solve the rest!
Use the cone formula:
And so:

5654866.7 / 12000 = 471,
So the answer is 471 weeks.
Hope this helps.