There are

ways of pairing up any 2 members from the pool of
contestants. Note that

so that

Answer:
y equals 4 because if you substitute solve and isolate you get that answer.
Answer:
-6
Step-by-step explanation:

Cot(-x) = 1 / tan(-x)
Tan(-x) * 1 / tan(-x) = 1
Answer:
A. Data
Step-by-step explanation: <em>Data is a term used to describe facts, information or statistics that are collected together in order for it to be used as a reference or for analysis.</em>
An effective data collection is one of the most important aspects in research,experiments or statistics as it helps to guarantee a reliable and effective outcome.
Data collection should be done in such a way that it helps to solve the problem which is being studied or handled.