6x + 1 - (2x - 5) =
6x + 1 - 2x + 5 =
4x + 6 <==
22 + 42/22 = 23.9090909091
So, I think the answer might be 23
Explanation:
a)


b) First, we have that

On the other hand,

Therefore, both expressions are equal. This makes sense, because selecting k elements from a group of n is the same than specify which elements you will not select. In order to specify those elements you need to select the n-k elements that will not be selected. Hence, each time you are selecting k from n, you are also selecting n-k from n, and from that reason both combinatorial numbers are equal.
Answer:
47.65 ice
Step-by-step explanation:
Hope this helps :)
No because 21=(11)+9
21 can’t equal to 20