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1 answer:
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Answer:
220 possible ways
Step-by-step explanation:
Given
--- people
-- posts
Required
Determine the number of selection
Since there is no condition attached, the number of selection is:
Substitute values for n and r
Apply combination formula
<em>Hence, there are 220 possible ways</em>
Answer:
Solution set = {-12, 12}
Step-by-step explanation:
Start by dividing both sides of the given equation by negative one, to get rid of the negative signs on both sides:
Now we consider the two possible cases:
1) The expression inside the absolute value symbol is a positive number, then :
and replacing it in the equation, this becomes:
which is our first answer.
2) The expression inside the absolute value symbol is a negative number, then :
and replacing it in the equation, this becomes:
which is our second possible answer.
Then the set of solutions is: {-12, 12}