What is x^2-2x-3=0 and in the simplest radical form
2 answers:
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Consider the first blank is the green box.
Given:
The equations are
To find:
The value belongs in the green box
Solution:
We have,
...(i)
...(ii)
Adding (i) and (ii), we get
So, the value for the first black is 2x. It means the value belongs in the green box is 2x.
The values of three blanks are 2x, 0 and 13 respectively.
Therefore, the correct option is B.
In combinatorics, this question is a combination question, because combination deals with selection while permutations deal with arrangement.
Plugging in our values,
That means 3 desserts from a tray of 8 desserts 56 times.